JAVA类 self study note2

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JAVA中传对象给方法

可以将一个对象传给方法。就像传数组一样，而传对象给方法就是将对象的引用传给方法。

下面这段代码解释了这个要点。

package com.shikun;public class Test3 {public static void main(String[] args) {// TODO Auto-generated method stubCircleWithPrivateDataFields c1=new CircleWithPrivateDataFields(5.0);printCircle(c1);}public static void printCircle(CircleWithPrivateDataFields c){//直接实例化出一个对象c，进行调用System.out.println("The radius of the circle is "+c.getRadius()+"and the area is "+c.getArea());}}

应用：

package com.shikun;public class TestPassObjects {public static void main(String[] args) {// TODO Auto-generated method stubCircleWithPrivateDataFields c1=new CircleWithPrivateDataFields(1);int n=5;printAreas(c1,n);System.out.println("\n"+"Radius is"+c1.getRadius());System.out.println("n is"+n);}public static void printAreas(CircleWithPrivateDataFields c,int n){System.out.println("Radius \t\tArea");while(n>=1){System.out.println(c.getRadius()+"\t\t"+c.getArea());c.setRadius(c.getRadius()+1);n--;}}}

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