// operators/EqualsMethod.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// Default equals() does not compare contents

class ValA {

int i;

}

class ValB {

int i;

// Works for this example, not a complete equals():

public boolean equals(Object o) {

ValB rval = (ValB)o; // Cast o to be a ValB

return i == rval.i;

}

}

public class EqualsMethod {

public static void main(String[] args) {

ValA va1 = new ValA();

ValA va2 = new ValA();

va1.i = va2.i = 100;

System.out.println(va1.equals(va2));

ValB vb1 = new ValB();

ValB vb2 = new ValB();

vb1.i = vb2.i = 100;

System.out.println(vb1.equals(vb2));

}

}

/* Output:

false

true

*/