Question

我有一个带有两个JPanel的JFrame。两个按钮。该应用程序首先没有面板，只有按钮。按下按钮后，我希望显示一个面板，然后按下另一个按钮，我将一个面板替换为另一个面板，反之亦然。我有这个代码，但它并没有真正起作用。面板（单击一个按钮，然后单击另一个按钮）显示在彼此之上。任何帮助，将不胜感激！提前谢谢！

Main.java

import javax.swing.*;
import javax.swing.text.View;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Main {

    static JButton enterDataButton = new JButton("Enter Data");
    static JButton viewDataButton = new JButton("View Data");


    static int yPosition = 10;
    static int xLabelPosition = 20;
    static int xFieldPosition = 20;
    static int labelWidth = 200;
    static int fieldWidth = 200;

    public static void main (String[] args) {

        final JFrame frame = new JFrame("SimpleTrans Main Window");
        JFrame.setDefaultLookAndFeelDecorated(true);
        frame.setBounds(100, 100, 1200, 800);
        frame.getContentPane().setLayout(null);

        JPanel mainPanel = new JPanel();

        enterDataButton.setBounds(xFieldPosition, yPosition, fieldWidth, 30);
        enterDataButton.setForeground(Color.DARK_GRAY);

        final InputDataArea inputDataArea = new InputDataArea();
        final ViewDataArea viewDataArea = new ViewDataArea();

        enterDataButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                System.out.println("enterData Button Pressed!");
                frame.remove(viewDataArea);
                inputDataArea.InputDataArea(frame.getContentPane());
                frame.add(inputDataArea);
                frame.getContentPane().invalidate();
                frame.getContentPane().validate();
                frame.getContentPane().repaint();
            }
        });

        viewDataButton.setBounds(xFieldPosition + fieldWidth, yPosition, fieldWidth, 30);
        viewDataButton.setForeground(Color.DARK_GRAY);

        viewDataButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                System.out.println("viewData Button Pressed!");
                frame.remove(inputDataArea);
                viewDataArea.ViewDataArea(frame.getContentPane());
                frame.add(viewDataArea);
                frame.getContentPane().revalidate();
                frame.getContentPane().validate();
                frame.getContentPane().repaint();
            }
        });

        frame.getContentPane().add(enterDataButton);
        frame.getContentPane().add(viewDataButton);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

InputDataArea.java

import javax.swing.*;
import java.awt.*;

public class InputDataArea extends JPanel {

    private DataTextField textFieldTripNumber = new DataTextField();
    private DataTextField textFieldExportCountry = new DataTextField();
    private DataTextField textFieldDestinationCountry = new DataTextField();
    private DataTextField textFieldPriceFixed = new DataTextField();


    JLabel textFieldLabelTripNumber = new JLabel("Trip Number:");
    JLabel textFieldLabelExportCountry = new JLabel("Export Country:");
    JLabel textFieldLabelDestinationCountry = new JLabel("Destination Country:");
    JLabel textFieldLabelPriceFixed = new JLabel("Price Fixed:");

    JButton saveButton = new JButton("Save");
    JButton emptyButton = new JButton("Empty");


    int yPosition = 60;
    int xLabelPosition = 20;
    int xFieldPosition = 220;
    int labelWidth = 200;
    int fieldWidth = 200;

    public void InputDataArea(Container pane) {
        textFieldLabelTripNumber.setBounds(xLabelPosition, yPosition, labelWidth, 20);
        pane.add(textFieldLabelTripNumber);

        textFieldTripNumber.setColumns(20);
        textFieldTripNumber.setBounds(xFieldPosition, yPosition, fieldWidth, 20);
        pane.add(textFieldTripNumber);


        textFieldLabelExportCountry.setBounds(xLabelPosition, yPosition + 30, labelWidth, 20);
        pane.add(textFieldLabelExportCountry);

        textFieldExportCountry.setColumns(20);
        textFieldExportCountry.setBounds(xFieldPosition, yPosition + 30, fieldWidth, 20);
        pane.add(textFieldExportCountry);


        textFieldLabelDestinationCountry.setBounds(xLabelPosition, yPosition + 60, labelWidth, 20);
        pane.add(textFieldLabelDestinationCountry);

        textFieldDestinationCountry.setColumns(20);
        textFieldDestinationCountry.setBounds(xFieldPosition, yPosition + 60, fieldWidth, 20);
        pane.add(textFieldDestinationCountry);


        textFieldLabelPriceFixed.setBounds(xLabelPosition, yPosition + 90, labelWidth, 20);
        pane.add(textFieldLabelPriceFixed);

        textFieldPriceFixed.setColumns(20);
        textFieldPriceFixed.setBounds(xFieldPosition, yPosition + 90, fieldWidth, 20);
        pane.add(textFieldPriceFixed);


        saveButton.setBounds(xFieldPosition, yPosition + 130, fieldWidth, 50);
        saveButton.setForeground(Color.GREEN);
        pane.add(saveButton);

        emptyButton.setBounds(xFieldPosition + fieldWidth, yPosition + 130, fieldWidth, 50);
        emptyButton.setForeground(Color.RED);
        pane.add(emptyButton);
    }
}

ViewDataArea.java

import javax.swing.*;
import java.awt.*;


public class ViewDataArea extends JPanel {

    private DataTextField textFieldTripNumber = new DataTextField();
    private DataTextField textFieldExportCountry = new DataTextField();
    private DataTextField textFieldDestinationCountry = new DataTextField();
    private DataTextField textFieldPriceFixed = new DataTextField();


    JLabel textFieldLabelViewData = new JLabel("ViewData");

    JButton saveButton = new JButton("Save");
    JButton emptyButton = new JButton("Empty");


    int yPosition = 60;
    int xLabelPosition = 20;
    int xFieldPosition = 220;
    int labelWidth = 200;
    int fieldWidth = 200;

    public void ViewDataArea(Container pane) {
        textFieldLabelViewData.setBounds(xLabelPosition, yPosition, labelWidth, 20);
        pane.add(textFieldLabelViewData);

    }
}

DataTextField.java

import javax.swing.*;
import java.util.ArrayList;
import java.util.List;

public class DataTextField extends JTextField {
    private List<JTextField> textFields = new ArrayList<JTextField>();
    public void addTextField(JTextField textField) {
        textFields.add(textField);
    }
}

Answer 1

你应该使用Card Layout。 Card Layout专门用于在同一位置显示多个组件。 Card Layout将为最大的组件保留空间，然后根据需要交换组件。

阅读How to Use Card Layout上Swing教程中的部分，以获取更多信息。

如何从JFrame中删除JPanel并将其替换为另一个

1 个答案: