[BAEL-3291] Move missing code snippets for the String Numeric article

Also: format the java-strings-ops project with required eclipse profile
This commit is contained in:
Martin van Wingerden
2019-10-23 21:32:49 +02:00
parent bcf119bf1a
commit 81c6758d01
31 changed files with 242 additions and 239 deletions

View File

@@ -37,8 +37,7 @@ public class AppendCharAtPositionX {
}
int len = str.length();
if (position < 0 || position > len) {
throw new IllegalArgumentException("position[" + position + "] should be "
+ "in the range 0.." + len + " for string " + str);
throw new IllegalArgumentException("position[" + position + "] should be " + "in the range 0.." + len + " for string " + str);
}
}

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@@ -12,10 +12,15 @@ class StringHelper {
}
static String removeLastCharOptional(String s) {
return Optional.ofNullable(s).filter(str -> str.length() != 0).map(str -> str.substring(0, str.length() - 1)).orElse(s);
return Optional.ofNullable(s)
.filter(str -> str.length() != 0)
.map(str -> str.substring(0, str.length() - 1))
.orElse(s);
}
static String removeLastCharRegexOptional(String s) {
return Optional.ofNullable(s).map(str -> str.replaceAll(".$", "")).orElse(s);
return Optional.ofNullable(s)
.map(str -> str.replaceAll(".$", ""))
.orElse(s);
}
}

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@@ -1,4 +1,4 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import java.util.concurrent.TimeUnit;
@@ -13,11 +13,9 @@ import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;
public class Benchmarking {
public static void main(String[] args) throws RunnerException {
Options opt = new OptionsBuilder()
.include(Benchmarking.class.getSimpleName())
Options opt = new OptionsBuilder().include(Benchmarking.class.getSimpleName())
.forks(1)
.build();
@@ -28,7 +26,7 @@ public class Benchmarking {
public static class ExecutionPlan {
public String number = Integer.toString(Integer.MAX_VALUE);
public boolean isNumber = false;
public IsNumeric isNumeric= new IsNumeric();
public IsNumeric isNumeric = new IsNumeric();
}
@Benchmark

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@@ -1,11 +1,10 @@
package com.baeldung.string.checkinputs;
package com.baeldung.string.isnumeric;
import java.util.Scanner;
public class CheckIntegerInput {
public static void main(String[] args) {
try (Scanner scanner = new Scanner(System.in)) {
System.out.println("Enter an integer : ");

View File

@@ -1,4 +1,4 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
@@ -6,7 +6,7 @@ import org.apache.commons.lang3.math.NumberUtils;
public class IsNumeric {
public boolean usingCoreJava(String strNum) {
try {
double d = Double.parseDouble(strNum);
Double.parseDouble(strNum);
} catch (NumberFormatException | NullPointerException nfe) {
return false;
}

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@@ -1,14 +1,11 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import org.apache.log4j.Logger;
public class IsNumericDriver {
private static IsNumeric isNumeric;
private static Logger LOG = Logger.getLogger(IsNumericDriver.class);
static {
isNumeric =new IsNumeric();
}
private static IsNumeric isNumeric = new IsNumeric();
public static void main(String[] args) {
LOG.info("Testing all methods...");
@@ -19,16 +16,16 @@ public class IsNumericDriver {
res = isNumeric.usingRegularExpressions("1001");
LOG.info("Using Regular Expressions : " + res);
res =isNumeric.usingNumberUtils_isCreatable("1001");
res = isNumeric.usingNumberUtils_isCreatable("1001");
LOG.info("Using NumberUtils.isCreatable : " + res);
res =isNumeric.usingNumberUtils_isParsable("1001");
res = isNumeric.usingNumberUtils_isParsable("1001");
LOG.info("Using NumberUtils.isParsable : " + res);
res =isNumeric.usingStringUtils_isNumeric("1001");
res = isNumeric.usingStringUtils_isNumeric("1001");
LOG.info("Using StringUtils.isNumeric : " + res);
res =isNumeric.usingStringUtils_isNumericSpace("1001");
res = isNumeric.usingStringUtils_isNumericSpace("1001");
LOG.info("Using StringUtils.isNumericSpace : " + res);
}
}

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@@ -7,12 +7,15 @@ public class Customer {
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}

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@@ -8,12 +8,13 @@ public class CustomerArrayToString extends Customer {
public Order[] getOrders() {
return orders;
}
public void setOrders(Order[] orders) {
this.orders = orders;
}
@Override
public String toString() {
return "Customer [orders=" + Arrays.toString(orders) + ", getFirstName()=" + getFirstName()
+ ", getLastName()=" + getLastName() + "]";
return "Customer [orders=" + Arrays.toString(orders) + ", getFirstName()=" + getFirstName() + ", getLastName()=" + getLastName() + "]";
}
}

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@@ -13,7 +13,6 @@ public class CustomerComplexObjectToString extends Customer {
@Override
public String toString() {
return "Customer [order=" + order + ", getFirstName()=" + getFirstName()
+ ", getLastName()=" + getLastName() + "]";
return "Customer [order=" + order + ", getFirstName()=" + getFirstName() + ", getLastName()=" + getLastName() + "]";
}
}

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@@ -13,7 +13,6 @@ public class CustomerPrimitiveToString extends Customer {
@Override
public String toString() {
return "Customer [balance=" + balance + ", getFirstName()=" + getFirstName()
+ ", getLastName()=" + getLastName() + "]";
return "Customer [balance=" + balance + ", getFirstName()=" + getFirstName() + ", getLastName()=" + getLastName() + "]";
}
}

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@@ -4,7 +4,7 @@ import java.util.List;
import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
public class CustomerReflectionToString extends Customer{
public class CustomerReflectionToString extends Customer {
private Integer score;
private List<String> orders;

View File

@@ -33,7 +33,6 @@ public class CustomerWrapperCollectionToString extends Customer {
@Override
public String toString() {
return "Customer [score=" + score + ", orders=" + orders + ", fullname=" + fullname
+ ", getFirstName()=" + getFirstName() + ", getLastName()=" + getLastName() + "]";
return "Customer [score=" + score + ", orders=" + orders + ", fullname=" + fullname + ", getFirstName()=" + getFirstName() + ", getLastName()=" + getLastName() + "]";
}
}

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@@ -38,6 +38,7 @@ public class Order {
public void setStatus(String status) {
this.status = status;
}
@Override
public String toString() {
return "Order [orderId=" + orderId + ", desc=" + desc + ", value=" + value + "]";

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@@ -0,0 +1,8 @@
# Root logger option
log4j.rootLogger=DEBUG, stdout
# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

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@@ -10,7 +10,6 @@ import org.junit.Test;
import com.google.common.base.CharMatcher;
/***
* Example of counting chars in a String.
*/
@@ -78,16 +77,21 @@ public class CountCharsExampleUnitTest {
@Test
public void givenString_whenUsingJava8Features_thenCountChars() {
String someString = "elephant";
long count = someString.chars().filter(ch -> ch == 'e').count();
long count = someString.chars()
.filter(ch -> ch == 'e')
.count();
assertEquals(2, count);
long count2 = someString.codePoints().filter(ch -> ch == 'e').count();
long count2 = someString.codePoints()
.filter(ch -> ch == 'e')
.count();
assertEquals(2, count2);
}
@Test
public void givenString_whenUsingGuavaCharMatcher_thenCountChars() {
int count = CharMatcher.is('e').countIn("elephant");
int count = CharMatcher.is('e')
.countIn("elephant");
assertEquals(2, count);
}

View File

@@ -62,47 +62,47 @@ public class AppendCharAtPositionXUnitTest {
assertEquals("Titanci", appendCharAtPosition.addCharUsingStringBuilder(word, letter, word.length()));
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingCharacterArrayAndCharacterAddedAtNegativePosition_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(word, letter, -1);
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingSubstringAndCharacterAddedAtNegativePosition_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(word, letter, -1);
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingStringBuilderAndCharacterAddedAtNegativePosition_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(word, letter, -1);
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingCharacterArrayAndCharacterAddedAtInvalidPosition_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(word, letter, word.length() + 2);
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingSubstringAndCharacterAddedAtInvalidPosition_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(word, letter, word.length() + 2);
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingStringBuilderAndCharacterAddedAtInvalidPosition_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(word, letter, word.length() + 2);
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingCharacterArrayAndCharacterAddedAtPositionXAndStringIsNull_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(null, letter, 3);
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingSubstringAndCharacterAddedAtPositionXAndStringIsNull_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(null, letter, 3);
}
@Test(expected=IllegalArgumentException.class)
@Test(expected = IllegalArgumentException.class)
public void whenUsingStringBuilderAndCharacterAddedAtPositionXAndStringIsNull_shouldThrowException() {
appendCharAtPosition.addCharUsingStringBuilder(null, letter, 3);
}

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@@ -1,6 +1,7 @@
package com.baeldung.string;
import static org.junit.Assert.*;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
public class PalindromeUnitTest {

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@@ -14,46 +14,39 @@ public class SplitUnitTest {
@Test
public void givenString_whenSplit_thenReturnsArray_through_JavaLangString() {
assertThat("peter,james,thomas".split(","))
.containsExactly("peter", "james", "thomas");
assertThat("peter,james,thomas".split(",")).containsExactly("peter", "james", "thomas");
assertThat("car jeep scooter".split(" "))
.containsExactly("car", "jeep", "scooter");
assertThat("car jeep scooter".split(" ")).containsExactly("car", "jeep", "scooter");
assertThat("1-120-232323".split("-"))
.containsExactly("1", "120", "232323");
assertThat("1-120-232323".split("-")).containsExactly("1", "120", "232323");
assertThat("192.168.1.178".split("\\."))
.containsExactly("192", "168", "1", "178");
assertThat("192.168.1.178".split("\\.")).containsExactly("192", "168", "1", "178");
assertThat("b a, e, l.d u, n g".split("\\s+|,\\s*|\\.\\s*"))
.containsExactly("b", "a", "e", "l", "d", "u", "n", "g");
assertThat("b a, e, l.d u, n g".split("\\s+|,\\s*|\\.\\s*")).containsExactly("b", "a", "e", "l", "d", "u", "n", "g");
}
@Test
public void givenString_whenSplit_thenReturnsArray_through_StringUtils() {
StringUtils.split("car jeep scooter");
assertThat(StringUtils.split("car jeep scooter"))
.containsExactly("car", "jeep", "scooter");
assertThat(StringUtils.split("car jeep scooter")).containsExactly("car", "jeep", "scooter");
assertThat(StringUtils.split("car jeep scooter"))
.containsExactly("car", "jeep", "scooter");
assertThat(StringUtils.split("car jeep scooter")).containsExactly("car", "jeep", "scooter");
assertThat(StringUtils.split("car:jeep:scooter", ":"))
.containsExactly("car", "jeep", "scooter");
assertThat(StringUtils.split("car:jeep:scooter", ":")).containsExactly("car", "jeep", "scooter");
assertThat(StringUtils.split("car.jeep.scooter", "."))
.containsExactly("car", "jeep", "scooter");
assertThat(StringUtils.split("car.jeep.scooter", ".")).containsExactly("car", "jeep", "scooter");
}
@Test
public void givenString_whenSplit_thenReturnsList_Splitter() {
//given
List<String> resultList = Splitter.on(',').trimResults().omitEmptyStrings().splitToList("car,jeep,, scooter");
// given
List<String> resultList = Splitter.on(',')
.trimResults()
.omitEmptyStrings()
.splitToList("car,jeep,, scooter");
assertThat(resultList)
.containsExactly("car", "jeep", "scooter");
assertThat(resultList).containsExactly("car", "jeep", "scooter");
}
@Test

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@@ -1,16 +1,16 @@
package com.baeldung.string;
import static org.assertj.core.api.Assertions.assertThat;
import java.util.Objects;
import org.apache.commons.lang3.StringUtils;
import org.junit.Test;
import java.util.Objects;
import static org.assertj.core.api.Assertions.assertThat;
public class StringComparisonUnitTest {
@Test
public void whenUsingComparisonOperator_ThenComparingStrings(){
public void whenUsingComparisonOperator_ThenComparingStrings() {
String string1 = "using comparison operator";
String string2 = "using comparison operator";
@@ -21,7 +21,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingEqualsMethod_ThenComparingStrings(){
public void whenUsingEqualsMethod_ThenComparingStrings() {
String string1 = "using equals method";
String string2 = "using equals method";
@@ -37,7 +37,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingEqualsIgnoreCase_ThenComparingStrings(){
public void whenUsingEqualsIgnoreCase_ThenComparingStrings() {
String string1 = "using equals ignore case";
String string2 = "USING EQUALS IGNORE CASE";
@@ -46,7 +46,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingCompareTo_ThenComparingStrings(){
public void whenUsingCompareTo_ThenComparingStrings() {
String author = "author";
String book = "book";
@@ -58,7 +58,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingCompareToIgnoreCase_ThenComparingStrings(){
public void whenUsingCompareToIgnoreCase_ThenComparingStrings() {
String author = "Author";
String book = "book";
@@ -70,7 +70,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingObjectsEqualsMethod_ThenComparingStrings(){
public void whenUsingObjectsEqualsMethod_ThenComparingStrings() {
String string1 = "using objects equals";
String string2 = "using objects equals";
@@ -84,7 +84,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingEqualsOfApacheCommons_ThenComparingStrings(){
public void whenUsingEqualsOfApacheCommons_ThenComparingStrings() {
assertThat(StringUtils.equals(null, null)).isTrue();
assertThat(StringUtils.equals(null, "equals method")).isFalse();
@@ -93,7 +93,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingEqualsIgnoreCaseOfApacheCommons_ThenComparingStrings(){
public void whenUsingEqualsIgnoreCaseOfApacheCommons_ThenComparingStrings() {
assertThat(StringUtils.equalsIgnoreCase(null, null)).isTrue();
assertThat(StringUtils.equalsIgnoreCase(null, "equals method")).isFalse();
@@ -102,7 +102,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingEqualsAnyOf_ThenComparingStrings(){
public void whenUsingEqualsAnyOf_ThenComparingStrings() {
assertThat(StringUtils.equalsAny(null, null, null)).isTrue();
assertThat(StringUtils.equalsAny("equals any", "equals any", "any")).isTrue();
@@ -112,18 +112,17 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingEqualsAnyIgnoreCase_ThenComparingStrings(){
public void whenUsingEqualsAnyIgnoreCase_ThenComparingStrings() {
assertThat(StringUtils.equalsAnyIgnoreCase(null, null, null)).isTrue();
assertThat(StringUtils.equalsAnyIgnoreCase("equals any", "equals any", "any")).isTrue();
assertThat(StringUtils.equalsAnyIgnoreCase("equals any", null, "equals any")).isTrue();
assertThat(StringUtils.equalsAnyIgnoreCase(null, "equals", "any")).isFalse();
assertThat(StringUtils.equalsAnyIgnoreCase(
"equals any ignore case", "EQUALS ANY IGNORE CASE", "any")).isTrue();
assertThat(StringUtils.equalsAnyIgnoreCase("equals any ignore case", "EQUALS ANY IGNORE CASE", "any")).isTrue();
}
@Test
public void whenUsingCompare_thenComparingStringsWithNulls(){
public void whenUsingCompare_thenComparingStringsWithNulls() {
assertThat(StringUtils.compare(null, null)).isEqualTo(0);
assertThat(StringUtils.compare(null, "abc")).isEqualTo(-1);
@@ -134,7 +133,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingCompareIgnoreCase_ThenComparingStringsWithNulls(){
public void whenUsingCompareIgnoreCase_ThenComparingStringsWithNulls() {
assertThat(StringUtils.compareIgnoreCase(null, null)).isEqualTo(0);
assertThat(StringUtils.compareIgnoreCase(null, "abc")).isEqualTo(-1);
@@ -145,7 +144,7 @@ public class StringComparisonUnitTest {
}
@Test
public void whenUsingCompareWithNullIsLessOption_ThenComparingStrings(){
public void whenUsingCompareWithNullIsLessOption_ThenComparingStrings() {
assertThat(StringUtils.compare(null, "abc", true)).isEqualTo(-1);
assertThat(StringUtils.compare(null, "abc", false)).isEqualTo(1);

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@@ -1,11 +1,11 @@
package com.baeldung.string;
import org.apache.commons.lang3.StringUtils;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import org.apache.commons.lang3.StringUtils;
import org.junit.Test;
public class StringHelperUnitTest {
public static final String TEST_STRING = "abcdef";

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@@ -1,4 +1,4 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import static org.assertj.core.api.Assertions.assertThat;

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@@ -1,4 +1,4 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import static org.assertj.core.api.Assertions.assertThat;

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@@ -1,4 +1,4 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import static org.assertj.core.api.Assertions.assertThat;

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@@ -1,4 +1,4 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import static org.assertj.core.api.Assertions.assertThat;

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@@ -1,8 +1,9 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import static org.assertj.core.api.Assertions.assertThat;
import org.apache.commons.lang3.StringUtils;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
public class StringUtilsIsNumericSpaceUnitTest {
@Test

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@@ -1,8 +1,9 @@
package com.baeldung.stringisnumeric;
package com.baeldung.string.isnumeric;
import static org.assertj.core.api.Assertions.assertThat;
import org.apache.commons.lang3.StringUtils;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
public class StringUtilsIsNumericUnitTest {
@Test

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@@ -5,8 +5,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
public class CustomerArrayToStringUnitTest {
private static final String CUSTOMER_ARRAY_TO_STRING
= "Customer [orders=[Order [orderId=A1111, desc=Game, value=0]], getFirstName()=Rajesh, getLastName()=Bhojwani]";
private static final String CUSTOMER_ARRAY_TO_STRING = "Customer [orders=[Order [orderId=A1111, desc=Game, value=0]], getFirstName()=Rajesh, getLastName()=Bhojwani]";
@Test
public void givenArray_whenToString_thenCustomerDetails() {

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@@ -5,8 +5,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
public class CustomerComplexObjectToStringUnitTest {
private static final String CUSTOMER_COMPLEX_TO_STRING
= "Customer [order=Order [orderId=A1111, desc=Game, value=0], getFirstName()=Rajesh, getLastName()=Bhojwani]";
private static final String CUSTOMER_COMPLEX_TO_STRING = "Customer [order=Order [orderId=A1111, desc=Game, value=0], getFirstName()=Rajesh, getLastName()=Bhojwani]";
@Test
public void givenComplex_whenToString_thenCustomerDetails() {

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@@ -6,8 +6,7 @@ import org.junit.jupiter.api.Test;
public class CustomerPrimitiveToStringUnitTest {
private static final String CUSTOMER_PRIMITIVE_TO_STRING
= "Customer [balance=110, getFirstName()=Rajesh, getLastName()=Bhojwani]";
private static final String CUSTOMER_PRIMITIVE_TO_STRING = "Customer [balance=110, getFirstName()=Rajesh, getLastName()=Bhojwani]";
@Test
public void givenPrimitive_whenToString_thenCustomerDetails() {
@@ -19,4 +18,3 @@ public class CustomerPrimitiveToStringUnitTest {
assertEquals(CUSTOMER_PRIMITIVE_TO_STRING, customer.toString());
}
}

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@@ -8,8 +8,7 @@ import java.util.List;
import org.junit.jupiter.api.Test;
public class CustomerWrapperCollectionToStringUnitTest {
private static final String CUSTOMER_WRAPPER_COLLECTION_TO_STRING
= "Customer [score=8, orders=[Book, Pen], fullname=Bhojwani, Rajesh, getFirstName()=Rajesh, getLastName()=Bhojwani]";
private static final String CUSTOMER_WRAPPER_COLLECTION_TO_STRING = "Customer [score=8, orders=[Book, Pen], fullname=Bhojwani, Rajesh, getFirstName()=Rajesh, getLastName()=Bhojwani]";
@Test
public void givenWrapperCollectionStrBuffer_whenToString_thenCustomerDetails() {
@@ -24,7 +23,7 @@ public class CustomerWrapperCollectionToStringUnitTest {
customer.setOrders(orders);
StringBuffer fullname = new StringBuffer();
fullname.append(customer.getLastName()+", "+ customer.getFirstName());
fullname.append(customer.getLastName() + ", " + customer.getFirstName());
customer.setFullname(fullname);
assertEquals(CUSTOMER_WRAPPER_COLLECTION_TO_STRING, customer.toString());

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@@ -1,7 +1,8 @@
package com.baeldung.stringpool;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
import static org.assertj.core.api.Assertions.*;
public class StringPoolUnitTest {