Java 如何在 JOptionPane 中显示多行？
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How do display multiple lines in JOptionPane?
提问by Hani Shah
How do I display all of this information here in just one dialog? Every time I run the file different dialog boxes appears, I really need them to appear in just one dialog box with all the information.
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，我真的需要它们只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 );
回答by Maroun
You can use HTMLtags:
您可以使用HTML标签：
JOptionPane.showMessageDialog(null, "<html><br>First line.<br>Second line.</html>");
Or you can pass an array of objects:
或者你可以传递一个对象数组：
An array of objects is interpreted as a series of messages (one per object) arranged in a vertical stack
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）
As mentioned in the docs.
如文档中所述。
回答by Hymanrabbit
Have a look at the Javadoc for JOptionPane, specifically the message part at the top. If you pass in an array of Object, its elements will be put in a vertical stack in the dialog.
查看JOptionPane的Javadoc，特别是顶部的消息部分。如果传入一个 Object 数组，它的元素将被放置在对话框中的垂直堆栈中。
JOptionPane.showMessageDialog(null,
new Object[]{"line 1","line 2","line 3","line 4"},
JOptionPane.INFORMATION_MESSAGE);
回答by nIcE cOw
Simply create a JPanelwith proper layout, as you want to place the components to be placed, and then add this JPanelto the JOptionPaneto display the message.
只需创建JPanel具有适当布局的一个，因为您要放置要放置的组件，然后将其添加JPanel到JOptionPane以显示消息。
A small example to help you understand the logic thingy :
一个帮助你理解逻辑的小例子：
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);
}
}
OUTPUT :
输出 ：
回答by Filipe Pinhati
Just enter this instead of all those lines:
只需输入这个而不是所有这些行：
JOptionPane.showMessageDialog(null,"Your Name: " + a1 +"\n Your age: " + age +"\n Your Birth year: "+ a3 +
"\n Your Height: " + H +"\n Your Weight: "+ W +"\n Your BMI: "+ BMI);
