java的命令行参数到底怎么用，请给截图和实际的例子

8.2 命令行参数示例（实验）   

public class Test {

    public static void main(String[] args){

        if(args.length==0){

            System.out.println("you don't set command line parameters!");

        }else{

            for (int i=0; i<args.length; i++){

                System.out.println("args[" + i + "] is: " + args[i]);

            }

        } 

    }

}

when use eclipse, don't "run as application",directly use "run configurations/run", then add in aguments in program arguments.（当运行eclipse，不要"run as application"，而直接用"run configurations/run"，然后加上参数在，program arguments.）

result is:

args[0] is: 马克-to-win

args[1] is: 的

args[2] is: 书

下图是有关非eclipse命令行的实验：

8.3 Arrays of Arrays(1)

An array that contains other arrays as its elements.（一个数组中包含其他的数组作为它的元素）

public class TwoDimentional {

    public static void main(String[] args) {

        char[][] table= new char[2][4];

            char[] row0 = {'A','B','Z','M'};

            char[] row1 = {'C','D','K','L'};

            table[0] = row0;

            table[1] = row1;

            for(int i=0; i<2;i++){

                for(int j=0;j<4;j++){

                    System.out.println(table[i][j]);

                }

            }

    }

}

更多请看：https://blog.csdn.net/qq_44639795/article/details/103144589