界面操作--拖放目标

[java]代码库

package Test;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JColorChooser;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.TransferHandler;

public class Test1 extends JFrame
{
	public static void main(String[] args)
	{
		EventQueue.invokeLater(() ->
		{
			JFrame frame = new Test1();
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			frame.setLocationRelativeTo(null); // 设置窗体出现位置居中
				frame.setVisible(true);
			});
	}

	public Test1()
	{
		JTabbedPane tabbedPane = new JTabbedPane();
		JFileChooser fileChooser = new JFileChooser();
		tabbedPane.addTab("File Chooser", fileChooser);
		JColorChooser colorChooser = new JColorChooser();
		tabbedPane.addTab("Color Chooser", colorChooser);
		JTextArea textArea = new JTextArea(10, 40);
		JScrollPane jScrollPane = new JScrollPane(textArea);

		// 允许成为拖拽源(从这里开始拖组件)
		fileChooser.setDragEnabled(true);
		colorChooser.setDragEnabled(true);

		// 让textField允许成为颜色的拖放目标(将组件放到这里)
		JTextField textField = new JTextField("Drag color here");
		textField.setTransferHandler(new TransferHandler("background"));

		add(tabbedPane, BorderLayout.NORTH);
		add(jScrollPane, BorderLayout.CENTER);
		add(textField, BorderLayout.SOUTH);
		pack();
	}

}