如何在JOptionPane中显示多行？

Question

如何在JOptionPane中显示多行？

如何在一个对话框中显示所有这些信息？每次运行文件时都会出现不同的对话框,我真的需要它们出现在一个包含所有信息的对话框中.

JOptionPane.showMessageDialog(null,"Your Name:"+a1,"Output",JOptionPane.INFORMATION_MESSAGE );
JOptionPane.showMessageDialog(null,"Your age:"+age,"Output",JOptionPane.INFORMATION_MESSAGE );
JOptionPane.showMessageDialog(null,"Your Birth year:"+a3,"Output",JOptionPane.INFORMATION_MESSAGE );
JOptionPane.showMessageDialog(null,"Your Height:"+H,"Output",JOptionPane.INFORMATION_MESSAGE );
JOptionPane.showMessageDialog(null,"Your Weight:"+W,"Output",JOptionPane.INFORMATION_MESSAGE );
JOptionPane.showMessageDialog(null,"Your BMI:"+BMI,"Output",JOptionPane.INFORMATION_MESSAGE );

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Answer 1

Mar*_*oun 7

你可以使用HTML标签:

JOptionPane.showMessageDialog(null, "<html><br>First line.<br>Second line.</html>");

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或者您可以传递一组对象:

对象数组被解释为以垂直堆栈排列的一系列消息(每个对象一个)

如文档中所述.

Answer 2

nIc*_*cOw 5

只需创建一个JPanel适当的布局,只要你想放置放置的组件,然后添加这个JPanel到JOptionPane要显示的消息.

一个帮助您理解逻辑的小例子:

import java.awt.*;
import javax.swing.*;

public class JOptionPaneExample {
    private String name;
    private int age;
    private int birthYear;

    public JOptionPaneExample() {
        name = "Myself";
        age = 19;
        birthYear = 1994;
    }

    private void displayGUI() {
        JOptionPane.showMessageDialog(
            null, getPanel(), "Output : ",
                JOptionPane.INFORMATION_MESSAGE);
    }

    private JPanel getPanel() {
        JPanel panel = new JPanel(new GridLayout(0, 1, 5, 5));
        JLabel nameLabel = getLabel("Your Name : " + name);
        JLabel ageLabel = getLabel("Your Age : " + age);
        JLabel yearLabel = getLabel("Your Birth Year : " + birthYear);
        panel.add(nameLabel);
        panel.add(ageLabel);
        panel.add(yearLabel);

        return panel;
    }

    private JLabel getLabel(String title) {
        return new JLabel(title);
    }

    public static void main(String[] args) {
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                new JOptionPaneExample().displayGUI();
            }
        };
        EventQueue.invokeLater(runnable);
    }
}

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输出:

optionpaneexample

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