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Move articles out of java-strings part2

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This commit is contained in:
catalin-burcea
2019-10-15 21:20:48 +03:00
parent 9199d0c895
commit a244dd2698
23 changed files with 111 additions and 41 deletions
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47
java-strings-ops/src/test/java/com/baeldung/string/CharSequenceVsStringUnitTest.java
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@@ -1,47 +0,0 @@
package com.baeldung.string;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
public class CharSequenceVsStringUnitTest {
@Test
public void givenUsingString_whenInstantiatingString_thenWrong() {
CharSequence firstString = "bealdung";
String secondString = "baeldung";
assertNotEquals(firstString, secondString);
}
@Test
public void givenIdenticalCharSequences_whenCastToString_thenEqual() {
CharSequence charSequence1 = "baeldung_1";
CharSequence charSequence2 = "baeldung_2";
assertTrue(charSequence1.toString().compareTo(charSequence2.toString()) < 0);
}
@Test
public void givenString_whenAppended_thenUnmodified() {
String test = "a";
int firstAddressOfTest = System.identityHashCode(test);
test += "b";
int secondAddressOfTest = System.identityHashCode(test);
assertNotEquals(firstAddressOfTest, secondAddressOfTest);
}
@Test
public void givenStringBuilder_whenAppended_thenModified() {
StringBuilder test = new StringBuilder();
test.append("a");
int firstAddressOfTest = System.identityHashCode(test);
test.append("b");
int secondAddressOfTest = System.identityHashCode(test);
assertEquals(firstAddressOfTest, secondAddressOfTest);
}
}

46
java-strings-ops/src/test/java/com/baeldung/string/StringBufferStringBuilder.java
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@@ -1,46 +0,0 @@
package com.baeldung.string;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;
public class StringBufferStringBuilder {
public static void main(String[] args) throws RunnerException {
Options opt = new OptionsBuilder()
.include(StringBufferStringBuilder.class.getSimpleName())
.build();
new Runner(opt).run();
}
@State(Scope.Benchmark)
public static class MyState {
int iterations = 1000;
String initial = "abc";
String suffix = "def";
}
@Benchmark
public StringBuffer benchmarkStringBuffer(MyState state) {
StringBuffer stringBuffer = new StringBuffer(state.initial);
for (int i = 0; i < state.iterations; i++) {
stringBuffer.append(state.suffix);
}
return stringBuffer;
}
@Benchmark
public StringBuilder benchmarkStringBuilder(MyState state) {
StringBuilder stringBuilder = new StringBuilder(state.initial);
for (int i = 0; i < state.iterations; i++) {
stringBuilder.append(state.suffix);
}
return stringBuilder;
}
}