valuereference.java

编程之道--java程序设计入门源代码

/*
*测试传值引用的实质
*/
public class ValueReference
{
	int a = 10;
	
	public static void main(String[] args)
	{
		ValueReference aValue = new  ValueReference ();
         aValue.print();
	}

	public void print()
	{
		int b = a;//我们将a的值传给了a
		System.out.println("before changed value a = " + a + ", b = " + b);
		a=30;
		System.out.println("after changed value　a = " + a + ", b = " + b);
	}
}