j02050201.java

经典java教材《java完美经典》一书中源码的完全收集

import java.lang.*;

class j02050201
{
  public static void main(String para[])
  {
		Integer myMoney = new Integer(10000);  // 传入 int 值
		Integer myInt = new Integer("26");  // 传入 String，正确的写法
		//Integer myInt2 = new Integer("26.0");  // 编译时末觉，但执行时有例外
		Integer theYear = new Integer(2000);
		theYear = new Integer(2001);   // new Integer(2000)产生的实体由系统自动收拾
		System.out.println("myMoney = "+ myMoney.intValue());
		System.out.println("myInt = "+ myInt.intValue());
		System.out.println("theYear = "+ theYear.intValue());
		
		//================================================
    System.out.println("myInt = " + myInt);   
      //println() 方法会自动取得 myInt 对象内含之 int 值
    
    //int I1 = myInt;  //错误，myInt 是对象，不能设定给 int 变量
		int I1 = myInt.intValue();
		System.out.println("I1 = " + I1);  			
  }
}