Swing-自定义对话框/创建对话框

设计图:

Swing-自定义对话框/创建对话框_第1张图片

类MyFrame:

设计思路:

1、设置底层面板并添加“测试”按钮

2、对按钮添加监听器

3、设计监听器里面的方法

3.1、添加对话框并设置其面板内容

3.2、添加lamada型简化监听器(当点击确定按钮时,对话框消失,最后返回用户的textfield的输入)

 

package swing01;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class MyFrame extends JFrame{
	
	public MyFrame(String title)
	{
		super(title);
		
		JPanel root=new JPanel();
		this.setContentPane(root);
		root.setLayout(new FlowLayout());
		
		//向根面板添加一个按钮
		JButton testButton=new JButton("测试");
		root.add(testButton);
		
		//监听器
		testButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				String str=getUserInput();
				System.out.println("用户输入了:"+str);
			}
			
		});
	
	}
	public String getUserInput()
	{
		//创建JDialog
		JDialog dialog=new JDialog(this,"信息框",true);
		JPanel panel=new JPanel();
		panel.setLayout(new FlowLayout());
		dialog.setContentPane(panel);
		
		//添加控件到对话框
		JTextField testfield=new JTextField(20);
		JButton button=new JButton("确定");
		panel.add(testfield);
		panel.add(button);
		
		//点击按钮时,关闭对话框
		button.addActionListener((e)->{
			dialog.setVisible(false);
		});
		
		//显示对话框(setVisible()方法会阻塞,直到对话框关闭)
		dialog.setSize(300, 100);
		dialog.setVisible(true);
		
		//对话框被关闭后,取得用户输入,并返回
		String text=testfield.getText();
		return text;
		
	}

}

类MyDemo: 

package swing01;
 
import java.awt.Container;
import java.awt.FlowLayout;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
 
public class MyDemo
{
	private static void createGUI()
	{
		// JFrame指一个窗口,构造方法的参数为窗口标题
		JFrame frame = new MyFrame("测试");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
				// 设置窗口的其他参数,如窗口大小
		frame.setSize(400, 300);
		
		// 显示窗口
		frame.setVisible(true);
	}
	
	public static void main(String[] args)
	{
		//设置界面样式 Look And Feel
		try {
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
				| UnsupportedLookAndFeelException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run()
			{
				createGUI();
			}
		});
 
	}
}

 

你可能感兴趣的:(swing基础)