sample5_3.java

封装

public class Sample5_3
{ final int x1=100;//声明并初始化int型成员变量x1
	//声明final 的int型成员变量x2与x3
	final int x2;
	final int x3;	
	{
		//初始化x2
		x2=120;	
	}
	public Sample1()
	{x3=140;//初始化x3}	
	public void showFinalX()
	{
		//显示三个final的成员变量
		System.out.println("final x1的值为"+x1+", 
		final x2的值为"+x2+", final x3的值为"+x3+"。");
	}
	public static void main(String args[])
	{Sample1 ss=new Sample1();ss.showFinalX();}	
}