有没有办法选择上一个消息对话框或下一个消息对话框？我有一个程序,在完成所有输入和数学计算后,会出现一个消息对话框,其中包含“人员1”的信息,然后按下确定,出现“人员2”的信息.如果可以选择能够在不同的对话框之间导航,那将是很好的.这是打印消息的程序的一部分.

for (i = 0; i < NumEmployees; i++)    
{
    JOptionPane.showMessageDialog(null, 
            "Employee: " + names[i] + "\n" + 
            "ID: " + data[i][0] + "\n" + 
            "Hours worked: " + (data[i][1] + data[i][2]) + "\n" + 
            "Overtime: " + data[i][2] + "hours" + "\n" + 
            "Amount earned: " + payment[i]);    
}

解决方法:

使用Action“将功能和状态与组件分开.”在下面的示例中,操作更改索引并从List< String>更新()JLabel.您的应用程序可能会从列表< Employee>更新JTextArea.

package gui;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

/**
 * @see https://*.com/a/20116944/230513
 */
public class PrevNext {

    private final List<String> list = new ArrayList<>(
        Arrays.asList("Alpher", "Bethe", "Gamow", "Dirac", "Einstein"));
    private int index = list.indexOf("Einstein");
    private final JLabel label = new JLabel(list.get(index), JLabel.CENTER);

    private void display() {
        JFrame f = new JFrame("PrevNext");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new JButton(new AbstractAction("<Prev") {

            @Override
            public void actionPerformed(ActionEvent e) {
                if (--index < 0) {
                    index = list.size() - 1;
                }
                update();
            }
        }), BorderLayout.LINE_START);
        f.add(label);
        f.add(new JButton(new AbstractAction("Next>") {

            @Override
            public void actionPerformed(ActionEvent e) {
                if (++index == list.size()) {
                    index = 0;
                }
                update();
            }
        }), BorderLayout.LINE_END);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }

    private void update() {
        label.setText(list.get(index));
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new PrevNext().display();
            }
        });
    }
}