Question

我拥有一个JFrame，并希望使用多个JPanel在它们之间进行交叉。我怎样才能做到这一点？我试过这样但是没有。

的JFrame

package gui;

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

@SuppressWarnings("serial")
public class Form_Main extends JFrame {

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Form_Main frame = new Form_Main();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public Form_Main() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);

        JPanel pg = new Panel_Giris();
        panelEkle(pg);
    }

    public void panelEkle(JPanel j) {
        j.setBorder(new EmptyBorder(5, 5, 5, 5));
        j.setLayout(null);
        setContentPane(j);
    }

}

的JPanel

package gui;

import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;

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

@SuppressWarnings("serial")
public class Panel_Giris extends JPanel {
    private JTextField textField;
    private JTextField textField_1;

    /**
     * Create the panel.
     */
    public Panel_Giris() {
        setLayout(null);

        JLabel lblNewLabel = new JLabel("New label");
        lblNewLabel.setBounds(68, 95, 70, 15);
        add(lblNewLabel);

        textField = new JTextField();
        textField.setBounds(177, 93, 114, 19);
        add(textField);
        textField.setColumns(10);

        JLabel lblNewLabel_1 = new JLabel("New label");
        lblNewLabel_1.setBounds(68, 143, 70, 15);
        add(lblNewLabel_1);

        textField_1 = new JTextField();
        textField_1.setBounds(177, 141, 114, 19);
        add(textField_1);
        textField_1.setColumns(10);

        JButton btnNewButton = new JButton("New button");
        btnNewButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                Form_Main fm = new Form_Main();
                JPanel ana = new Panel_A();
                fm.panelEkle(ana);
            }
        });
        btnNewButton.setBounds(177, 193, 117, 25);
        add(btnNewButton);

    }
}

我有一个名为panelEkle（）的空格来添加一个面板，在这个过程中我从外面取出面板对象并将其打印在框架上，但它不起作用，因为我错过了一些东西。

我的逻辑错了吗？

Answer 1

要在Frame上添加单独的JPanel，您可以将单独的面板添加到主框架中的面板，如下所示：

public void addPanelToMainFrame(JPanel backPanel, JPanel frontPanel) {
        backPanel.removeAll();
        backPanel.revalidate();

        backPanel.setLayout(new BorderLayout());
        backPanel.add(frontPanel);
        backPanel.repaint();

    }

如何使用不同的JPanel

1 个答案: