Question

java如何做一个jframe能够收起如下图

能够在点<<Details按钮后收起文本框并且按钮显示为Details>>,在点Details>>按钮后显示文本框并且按钮显示为<<Details求代码。

Answer 1

 大概的如下所示：

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class DetailsFrame extends JFrame implements ActionListener {
    boolean isFold = true;
    JTextArea area = null;
    JScrollPane scrollpane = null;
    public DetailsFrame() {
        JPanel panel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
        JButton btn = new JButton(">>Details");
        btn.addActionListener(this);
        panel.add(btn);
        add(panel, BorderLayout.NORTH);
        area = new JTextArea();
        scrollpane = new JScrollPane();
        scrollpane.setVisible(false);
        scrollpane.setViewportView(area);
        add(scrollpane, BorderLayout.CENTER);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(400, 100);
        setVisible(true);
    }
    public static void main(String[] args) {
        new DetailsFrame();
    }
    public void actionPerformed(ActionEvent e) {
        JButton btn = (JButton) e.getSource();
        if (isFold) {
            scrollpane.setVisible(true);
            setSize(400, 300);
            btn.setText("<<Details");
            isFold = false;
        } else {
            scrollpane.setVisible(false);
            setSize(400, 100);
            btn.setText(">>Details");
            isFold = true;
        }
    }
}