package chapter9;

import java.util.function.BiFunction;

import java.util.*;

class MyClass

{

int i1;

int i2;

String s;

public MyClass(int x, int y, String z)

{

i1 = x;

i2 = y;

s = z;

}

@Override

public String toString() { return i1 + " " + i2 + " " + s; }

}

public class Sect6_Ex1

{

public static void main(String[] args)

{

Map<String,MyClass> m = new TreeMap<>();

m.put("k1",new MyClass(1, 2, "Dog"));

BiFunction<MyClass,MyClass,MyClass> changeI2 =

(ov,nv) -> new MyClass(ov.i1, nv.i2, ov.s);

BiFunction<MyClass,MyClass,MyClass> changeS =

(ov,nv) -> new MyClass(ov.i1, ov.i2, nv.s);

System.out.println(m.merge("k1", new MyClass(0, 5, null ),

changeI2));

System.out.println(m.merge("k1", new MyClass(0, 0, "Cat" ),

changeS));

System.out.println(m.merge("k2", new MyClass(6, 7, "Bird"),

changeS));

System.out.println();

m.forEach( (x,y) -> System.out.println(x + " " + y));

}

}