如何为不同的单击按钮显示不同的消息？ [英] How can I display a different message for a different clicked button?

问题描述

首先，我希望对编码非常了解。我希望我的代码能够为单击的每个按钮产生不同的JOptionPane消息

First I'd like it to be known im VERY new to coding. I would like to have my code be able to produce a different JOptionPane Message for every button clicked

ive尝试过包含t [1] [1] = JOptionPane（null，消息）（每个按钮的位置），但出现错误，提示您无法将Jbutton转换为字符串。

ive tried including t[1][1] = JOptionPane(null, "message") (the location of each button) however the error came up saying you cant convert Jbutton to string.

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class jep implements ActionListener{

    public  JButton[][] t = new JButton[6][6];

    public static void main(String[] args) {
        new jep();
    }
    static int n = 100;

    public jep()  {

        JFrame frame = new JFrame("Jeopardy");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(1920,1080);
        frame.setLayout(new GridLayout(6, 6));

        frame.setVisible(true);
        for (int r = 0; r < 5; r++) {
            for (int c = 0; c < 6; c++) {
                String vakue = String.valueOf(n);
                t[r][c] = new JButton(vakue);
                t[r][c].setBackground(Color.BLUE);
                t[r][c].setForeground(Color.YELLOW);
                t[r][c].addActionListener(this);
                frame.add(t[r][c]);
            }
            n = n +300;
        }
    }
    @Override
    public void actionPerformed(ActionEvent arg0) {
        JOptionPane.showInputDialog(null,"What's 1+1?");
    }
}

我希望它使每个单击的按钮都说些什么其他...例如，如果您单击第一个按钮，它显示为红色，第二个按钮是蓝色，等等...

I would like it so that every button clicked says something else... For example if you click the first button it says like "RED" and the second "BLUE" etc...

推荐答案

此有效答案的另一种替代方法：

您可以更改操作侦听器以识别

Another alternative to this valid answer:
You can change the action listener to identify which button was clicked, and respond accordingly:

public void actionPerformed(ActionEvent e) {

    String value = e.getActionCommand();
    String message = "";

    switch(value){
        case "100":
            message = "RED";
            break;
        case "400":
            message = "BLUE";
            break;
        default:
            message = "Un recognized button pressed";
            break;
    }

    JOptionPane.showInputDialog(null,message);
}

旁注：请勿 frame.setSize（1920 ，1080）； 而是设置首选大小，并让

Side notes: do not frame.setSize(1920, 1080); instead set preferred size and have

    frame.pack();
    frame.setVisible(true);

在构造函数末尾，添加完所有组件之后。

at the end of the constructor, after all components have been added.

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