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[BAEL-12899] - Splitted the java-strings module (#7410)

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This commit is contained in:
Amit Pandey
2019-08-02 10:14:32 +05:30
committed by Josh Cummings
parent 87ba90d455
commit ec46f6de26
76 changed files with 212 additions and 66 deletions
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11
java-strings-ops/src/main/java/com/baeldung/datetime/UseLocalDateTime.java Normal file
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package com.baeldung.datetime;
import java.time.LocalDateTime;
public class UseLocalDateTime {
public LocalDateTime getLocalDateTimeUsingParseMethod(String representation) {
return LocalDateTime.parse(representation);
}
}

45
java-strings-ops/src/main/java/com/baeldung/string/AppendCharAtPositionX.java Normal file
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/**
*
*/
package com.baeldung.string;
/**
* @author swpraman
*
*/
public class AppendCharAtPositionX {
public String addCharUsingCharArray(String str, char ch, int position) {
validate(str, position);
int len = str.length();
char[] updatedArr = new char[len + 1];
str.getChars(0, position, updatedArr, 0);
updatedArr[position] = ch;
str.getChars(position, len, updatedArr, position + 1);
return new String(updatedArr);
}
public String addCharUsingSubstring(String str, char ch, int position) {
validate(str, position);
return str.substring(0, position) + ch + str.substring(position);
}
public String addCharUsingStringBuilder(String str, char ch, int position) {
validate(str, position);
StringBuilder sb = new StringBuilder(str);
sb.insert(position, ch);
return sb.toString();
}
private void validate(String str, int position) {
if (str == null) {
throw new IllegalArgumentException("Str should not be null");
}
int len = str.length();
if (position < 0 || position > len) {
throw new IllegalArgumentException("position[" + position + "] should be "
+ "in the range 0.." + len + " for string " + str);
}
}
}

66
java-strings-ops/src/main/java/com/baeldung/string/Palindrome.java Normal file
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package com.baeldung.string;
import java.util.stream.IntStream;
public class Palindrome {
public boolean isPalindrome(String text) {
String clean = text.replaceAll("\\s+", "").toLowerCase();
int length = clean.length();
int forward = 0;
int backward = length - 1;
while (backward > forward) {
char forwardChar = clean.charAt(forward++);
char backwardChar = clean.charAt(backward--);
if (forwardChar != backwardChar)
return false;
}
return true;
}
public boolean isPalindromeReverseTheString(String text) {
StringBuilder reverse = new StringBuilder();
String clean = text.replaceAll("\\s+", "").toLowerCase();
char[] plain = clean.toCharArray();
for (int i = plain.length - 1; i >= 0; i--)
reverse.append(plain[i]);
return (reverse.toString()).equals(clean);
}
public boolean isPalindromeUsingStringBuilder(String text) {
String clean = text.replaceAll("\\s+", "").toLowerCase();
StringBuilder plain = new StringBuilder(clean);
StringBuilder reverse = plain.reverse();
return (reverse.toString()).equals(clean);
}
public boolean isPalindromeUsingStringBuffer(String text) {
String clean = text.replaceAll("\\s+", "").toLowerCase();
StringBuffer plain = new StringBuffer(clean);
StringBuffer reverse = plain.reverse();
return (reverse.toString()).equals(clean);
}
public boolean isPalindromeRecursive(String text) {
String clean = text.replaceAll("\\s+", "").toLowerCase();
return recursivePalindrome(clean, 0, clean.length() - 1);
}
private boolean recursivePalindrome(String text, int forward, int backward) {
if (forward == backward)
return true;
if ((text.charAt(forward)) != (text.charAt(backward)))
return false;
if (forward < backward + 1) {
return recursivePalindrome(text, forward + 1, backward - 1);
}
return true;
}
public boolean isPalindromeUsingIntStream(String text) {
String temp = text.replaceAll("\\s+", "").toLowerCase();
return IntStream.range(0, temp.length() / 2)
.noneMatch(i -> temp.charAt(i) != temp.charAt(temp.length() - i - 1));
}
}

21
java-strings-ops/src/main/java/com/baeldung/string/StringHelper.java Normal file
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package com.baeldung.string;
import java.util.Optional;
class StringHelper {
static String removeLastChar(String s) {
return (s == null || s.length() == 0) ? s : (s.substring(0, s.length() - 1));
}
static String removeLastCharRegex(String s) {
return (s == null) ? s : s.replaceAll(".$", "");
}
static String removeLastCharOptional(String s) {
return Optional.ofNullable(s).filter(str -> str.length() != 0).map(str -> str.substring(0, str.length() - 1)).orElse(s);
}
static String removeLastCharRegexOptional(String s) {
return Optional.ofNullable(s).map(str -> str.replaceAll(".$", "")).orElse(s);
}
}

19
java-strings-ops/src/main/java/com/baeldung/string/tostring/Customer.java Normal file
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package com.baeldung.string.tostring;
public class Customer {
private String firstName;
private String lastName;
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;
}
}

19
java-strings-ops/src/main/java/com/baeldung/string/tostring/CustomerArrayToString.java Normal file
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package com.baeldung.string.tostring;
import java.util.Arrays;
public class CustomerArrayToString extends Customer {
private Order[] orders;
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() + "]";
}
}

19
java-strings-ops/src/main/java/com/baeldung/string/tostring/CustomerComplexObjectToString.java Normal file
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package com.baeldung.string.tostring;
public class CustomerComplexObjectToString extends Customer {
private Order order;
public Order getOrder() {
return order;
}
public void setOrder(Order order) {
this.order = order;
}
@Override
public String toString() {
return "Customer [order=" + order + ", getFirstName()=" + getFirstName()
+ ", getLastName()=" + getLastName() + "]";
}
}

19
java-strings-ops/src/main/java/com/baeldung/string/tostring/CustomerPrimitiveToString.java Normal file
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package com.baeldung.string.tostring;
public class CustomerPrimitiveToString extends Customer {
private long balance;
public long getBalance() {
return balance;
}
public void setBalance(long balance) {
this.balance = balance;
}
@Override
public String toString() {
return "Customer [balance=" + balance + ", getFirstName()=" + getFirstName()
+ ", getLastName()=" + getLastName() + "]";
}
}

41
java-strings-ops/src/main/java/com/baeldung/string/tostring/CustomerReflectionToString.java Normal file
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package com.baeldung.string.tostring;
import java.util.List;
import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
public class CustomerReflectionToString extends Customer{
private Integer score;
private List<String> orders;
private StringBuffer fullname;
public Integer getScore() {
return score;
}
public void setScore(Integer score) {
this.score = score;
}
public List<String> getOrders() {
return orders;
}
public void setOrders(List<String> orders) {
this.orders = orders;
}
public StringBuffer getFullname() {
return fullname;
}
public void setFullname(StringBuffer fullname) {
this.fullname = fullname;
}
@Override
public String toString() {
return ReflectionToStringBuilder.toString(this);
}
}

39
java-strings-ops/src/main/java/com/baeldung/string/tostring/CustomerWrapperCollectionToString.java Normal file
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package com.baeldung.string.tostring;
import java.util.List;
public class CustomerWrapperCollectionToString extends Customer {
private Integer score;
private List<String> orders;
private StringBuffer fullname;
public Integer getScore() {
return score;
}
public void setScore(Integer score) {
this.score = score;
}
public List<String> getOrders() {
return orders;
}
public void setOrders(List<String> orders) {
this.orders = orders;
}
public StringBuffer getFullname() {
return fullname;
}
public void setFullname(StringBuffer fullname) {
this.fullname = fullname;
}
@Override
public String toString() {
return "Customer [score=" + score + ", orders=" + orders + ", fullname=" + fullname
+ ", getFirstName()=" + getFirstName() + ", getLastName()=" + getLastName() + "]";
}
}

46
java-strings-ops/src/main/java/com/baeldung/string/tostring/Order.java Normal file
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package com.baeldung.string.tostring;
public class Order {
private String orderId;
private String desc;
private long value;
private String status;
public String getOrderId() {
return orderId;
}
public void setOrderId(String orderId) {
this.orderId = orderId;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public long getValue() {
return value;
}
public void setValue(long value) {
this.value = value;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
@Override
public String toString() {
return "Order [orderId=" + orderId + ", desc=" + desc + ", value=" + value + "]";
}
}