conversiontester.java

基于netbeans的java桌面应用程序合集

package com.sun.tiger.autoboxing;

import java.util.Collection;
import java.util.Iterator;

/*
 * boolean: true, false
 * byte: all
 * short, int: -128 -- 127
 * char:\u0000 - \u007F
 */

public class ConversionTester {
    
    public static void main(String[] args) {
        
        //Integer i = new Integer(0);
        
        Integer i = 0;
        
        // Boxing
        int foo = 0;
        Integer integer = foo;
        
        // Simple Unboxing
        int bar = integer;
        
        Integer counter = 10;        // boxing
        int counter2 = counter;     // unboxing
        
        while (true) {
            System.out.printf("Iteration %d%n", counter++); //
            if (counter > 10) break;//
        }
        
        Boolean case1 = true;
        Boolean case2 = true;
        boolean case3 = false;
        
        Boolean result = (case1 || case2) && case3;
        
        Integer i1 = 256;
        Integer i2 = 256;
        
        if (i1 == i2) System.out.println("Equal!");
        else System.out.println("Not equal!");
        
        Integer i3 = 100;
        Integer i4 = 100;
        
        if(i3 == i4)System.out.println("Equal!");
        else System.out.println("Not equal!");
        
        Boolean arriving = false;
        Boolean late = true;
        
        System.out.println(arriving ? (late ? "It's about time!" : "Hello!") :
            (late ? "Better hurry!" : "Goodbye"));
/*
    Integer peopleInRoom = 0;
    int maxCapacity = 100;
    boolean timeToLeave = false;
    while (peopleInRoom < maxCapacity) {
      if (arriving) {
        System.out.println("It's good to see you.");
        peopleInRoom++;
      } else {
        peopleInRoom--;
      }
      if (timeToLeave) {
        do {
          System.out.printf("Hey, person %d, get out!%n", peopleInRoom);
          peopleInRoom--;
        } while (peopleInRoom > 0);
      }
    }
 */
 
        
        int test = 1;
        doSomething(test);
        
    }
    
    public static void doSomething(double num){
        System.out.println("double version");
    }
    
    public static void doSomething(Integer num){
        System.out.println("Integer version");
    }
}