// references/MutableInteger.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.
// A changeable wrapper class
import java.util.*;
import java.util.stream.*;
class IntValue {
private int n;
IntValue(int x) { n = x; }
public int getValue() { return n; }
public void setValue(int n) { this.n = n; }
public void increment() { n++; }
@Override public String toString() {
return Integer.toString(n);
}
}
public class MutableInteger {
public static void main(String[] args) {
List