OnJava8-Examples/functional/MultiUnbound.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// functional/MultiUnbound.java

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

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

// Unbound methods with multiple arguments

class This {

void two(int i, double d) {}

void three(int i, double d, String s) {}

void four(int i, double d, String s, char c) {}

}

interface TwoArgs {

void call2(This athis, int i, double d);

}

interface ThreeArgs {

void call3(This athis, int i, double d, String s);

}

interface FourArgs {

void call4(

This athis, int i, double d, String s, char c);

}

public class MultiUnbound {

public static void main(String[] args) {

TwoArgs twoargs = This::two;

ThreeArgs threeargs = This::three;

FourArgs fourargs = This::four;

This athis = new This();

twoargs.call2(athis, 11, 3.14);

threeargs.call3(athis, 11, 3.14, "Three");

fourargs.call4(athis, 11, 3.14, "Four", 'Z');

}