Implementation of Java equals function

example.java

public class Example {
    private int value;
    //getters and setters, constructor
    @Override
    public boolean equals(Object o) {
        // same address
        if (o == this) return true;
        // other type
        if (!(o instanceof Example)) {
            return false;
        }
        // cast
        Example that = (Example) o;
        // check value
        return this.value == that.value;
    }
}