java命令行参数

（1）doc环境下

cmd->cd java文件所在目录->javac ValueOfDemo.java->java ValueOfDemo parameter  98 26

说明：程序向main（String[] args）的args中传递两个参数98  26（用一个或多个空格隔开）给主程序。

public class ValueOfDemo {
    public static void main(String[] args) {

	    //this program requires two arguments on the command line  
        if (args.length == 2) {
			//convert strings to numbers
            float a = (Float.valueOf(args[0]) ).floatValue();  
            float b = (Float.valueOf(args[1]) ).floatValue();

            //do some arithmetic
            System.out.println("a + b = " + (a + b) );
            System.out.println("a - b = " + (a - b) );
            System.out.println("a * b = " + (a * b) );
            System.out.println("a / b = " + (a / b) );
            System.out.println("a % b = " + (a % b) );
        } else {
           System.out.println("This program requires two command-line arguments.");
        }
    }
}

 结果：

 

a + b = 124.0
a - b = 72.0
a * b = 2548.0
a / b = 3.7692308
a % b = 20.0

（2）myeclipse中命令行参数传递

菜单栏的Run -> Run Configurations 在Arguments的Program arguments里输入参数 一行一个