Question

// **如何将数学随机生成器放入此程序中。谢谢：） ** /

//无论如何，这个程序都是关于使用JOption实用程序的摇滚，纸张，剪刀游戏。 //你能帮我把数学随机生成器放在播放器2中吗？因为我不知道如何把它。 import javax.swing.JOptionPane; 课堂活动13 {

public static void main(String []args){

    int p1 = 0;
    int p2 = 0;

    String player1 = JOptionPane.showInputDialog("Select an option:\n(r) Rock\n(p) Paper\n(s) Scissor\nPlease input a keyword for player 1");
    String player2 = JOptionPane.showInputDialog("Select an option:\n(r) Rock\n(p) Paper\n(s) Scissor\nPlease input a keyword for player 2");

    String rock = "R";
    String paper = "P";
    String scissor = "S";


    if(player1.equalsIgnoreCase(rock)){

        p1 = 1;

    }
    if(player1.equalsIgnoreCase(paper)){

        p1 = 2;

    }
    if(player1.equalsIgnoreCase(scissor)){

        p1 = 3;

    }
    if(player2.equalsIgnoreCase(rock)){

        p2 = 1;

    }
    if(player2.equalsIgnoreCase(paper)){

        p2 = 2;

    }
    if(player2.equalsIgnoreCase(scissor)){

        p2 = 3;

    }
    if(p1 == p2){

        JOptionPane.showMessageDialog(null, "Draw", "Result", JOptionPane.INFORMATION_MESSAGE);

    }
    if(p1 == 1 && p2 == 2){

        JOptionPane.showMessageDialog(null, "Player 2 Wins", "Result", JOptionPane.INFORMATION_MESSAGE);

    }
    if(p1 == 1 && p2 == 3){

        JOptionPane.showMessageDialog(null, "Player 1 Wins", "Result", JOptionPane.INFORMATION_MESSAGE);

    }
    if(p1 == 2 && p2 == 1){

        JOptionPane.showMessageDialog(null, "Player 1 Wins", "Result", JOptionPane.INFORMATION_MESSAGE);

    }
    if(p1 == 2 && p2 == 3){

        JOptionPane.showMessageDialog(null, "Player 2 Wins", "Result", JOptionPane.INFORMATION_MESSAGE);

    }
    if(p1 == 3 && p2 == 1){

        JOptionPane.showMessageDialog(null, "Player 2 Wins", "Result", JOptionPane.INFORMATION_MESSAGE);

    }
    if(p1 == 3 && p2 == 2){

        JOptionPane.showMessageDialog(null, "Player 1 Wins", "Result", JOptionPane.INFORMATION_MESSAGE);

    }
}

}

Answer 1

随机数可以由java.util.Random生成。

准备生成随机数：即代码放置在开始附近。

import java.util.Random;

Random randomGenerator = new Random(); /* create intance of Random */

将1到3之间的随机数设置为变量p2的代码

p2 = randomGenerator.nextInt(3) + 1 /* nextInt(3) will return random number between 0 to 2, so add 1 */

很简单。

数学随机发生器

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