math.java

java程序设计教程的源码

// Math.java
package com.comsoft.ch03.p2;// 创建另一个包
public class Math {// Math为public类，可跨访问
	public double add(double x, double y) { return x + y; }
	public double subtract(double x, double y) { return x - y; }
	public double multiply(double x, double y) { return x * y; }
	public double divide(double x, double y) { return x / y; }
}