67 lines
1.7 KiB
Java
67 lines
1.7 KiB
Java
// equalshashcode/ComposedEquality.java
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// (c)2020 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.util.*;
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class Part {
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String ss;
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double dd;
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Part(String ss, double dd) {
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this.ss = ss;
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this.dd = dd;
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}
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@Override
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public boolean equals(Object rval) {
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return rval instanceof Part &&
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Objects.equals(ss, ((Part)rval).ss) &&
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Objects.equals(dd, ((Part)rval).dd);
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}
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}
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public class ComposedEquality extends SuccinctEquality {
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Part part;
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public ComposedEquality(int i, String s, double d) {
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super(i, s, d);
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part = new Part(s, d);
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System.out.println("made 'ComposedEquality'");
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}
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@Override
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public boolean equals(Object rval) {
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return rval instanceof ComposedEquality &&
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super.equals(rval) &&
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Objects.equals(part,
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((ComposedEquality)rval).part);
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}
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public static void main(String[] args) {
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Equality.testAll( (i, s, d) ->
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new ComposedEquality(i, s, d));
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}
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}
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/* Output:
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made 'Equality'
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made 'SuccinctEquality'
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made 'ComposedEquality'
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made 'Equality'
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made 'SuccinctEquality'
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made 'ComposedEquality'
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made 'Equality'
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made 'SuccinctEquality'
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made 'ComposedEquality'
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-- Testing null --
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null instanceof Equality: false
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Expected false, got false
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-- Testing same object --
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same object instanceof Equality: true
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Expected true, got true
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-- Testing different type --
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different type instanceof Equality: false
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Expected false, got false
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-- Testing same values --
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same values instanceof Equality: true
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Expected true, got true
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-- Testing different values --
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different values instanceof Equality: true
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Expected false, got false
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*/
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