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/*
One>>>BuilderTrial@1d1acd3[
Name=Becker
Age=35
]
Two>>>BuilderTrial@743399[
Name=Becker
Age=35
]
Three>>>BuilderTrial@e7b241[
Name=Agassi
Age=33
]
one equals two? true
one equals three? false
One HashCode>>> -923455822
Two HashCode>>> -923455822
Three HashCode>>> -1433293806
*/
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;
public class BuilderTrial {
private String name;
private int age;
public BuilderTrial(String name, int age) {
this.name = name;
this.age = age;
}
public static void main(String[] args) {
// Create new BuilderTrial instances
BuilderTrial one = new BuilderTrial("Becker", 35);
BuilderTrial two = new BuilderTrial("Becker", 35);
BuilderTrial three = new BuilderTrial("Agassi", 33);
// one and two hold the same data in different objects
// three holds different data
System.out.println("One>>>" + one);
System.out.println("Two>>>" + two);
System.out.println("Three>>>" + three);
System.out.println("one equals two? " + one.equals(two));
System.out.println("one equals three? " + one.equals(three));
// As one and two hold the same data, the same hashcode is returned.
System.out.println("One HashCode>>> " + one.hashCode());
System.out.println("Two HashCode>>> " + two.hashCode());
System.out.println("Three HashCode>>> " + three.hashCode());
}
public boolean equals(Object objCompared) {
if (!(objCompared instanceof BuilderTrial)) {
return false;
}
BuilderTrial rhs = (BuilderTrial) objCompared;
return new EqualsBuilder().append(name, rhs.name).append(age, rhs.age).isEquals();
}
public String toString() {
return new ToStringBuilder(this, ToStringStyle.MULTI_LINE_STYLE).append("Name", name).append(
"Age", age).toString();
}
public int hashCode() {
return new HashCodeBuilder(15, 19).append(name).append(age).toHashCode();
}
}
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Apache-Common-Lang.zip( 248 k)