Question

我希望通过调整窗口大小来调整JFrame上的组件大小。

如何做到这一点。

目前，当我使JFrame变小时，组件会保留在同一个位置，然后随着帧变小而消失。

理想情况下，我想设置一个最小的JFrame大小，这个大小不允许表单变得更小，但是当我把它变大时，组件应该随JFrame一起移动。

添加：如果我想使用绝对布局管理器怎么办？这是我老板喜欢的布局管理器。

代码：

import java.awt.Color; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; import javax.swing.JButton; import javax.swing.JCheckBox; import java.awt.Font;

公共类TestFrame扩展了JFrame { private static final long serialVersionUID = 1L; 私人JPanel contentPane; 私人JButton btnNewButton; 私人JButton btnNewButton_1; 私人JButton btnNewButton_2; 私人JCheckBox chckbxNewCheckBox; 私人JCheckBox chckbxNewCheckBox_1; 私人JCheckBox chckbxNewCheckBox_2;

public static void main(String[] args) {
    TestFrame frame = new TestFrame();
    frame.setVisible(true);
}

public TestFrame() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 629, 458);

    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(15, 15, 15, 15));
    setContentPane(contentPane);
    contentPane.setLayout(null);

    btnNewButton = new JButton("Save");
    btnNewButton.setFont(new Font("Sylfaen", Font.BOLD, 14));
    btnNewButton.setBounds(514, 386, 89, 23);
    contentPane.add(btnNewButton);

    btnNewButton_1 = new JButton("Open");
    btnNewButton_1.setBounds(514, 352, 89, 23);
    contentPane.add(btnNewButton_1);

    btnNewButton_2 = new JButton("Close");
    btnNewButton_2.setBounds(514, 318, 89, 23);
    contentPane.add(btnNewButton_2);
    btnNewButton_2.setBackground(Color.YELLOW);
    btnNewButton_2.setEnabled(false);

    chckbxNewCheckBox = new JCheckBox("Employeed");
    chckbxNewCheckBox.setBounds(506, 7, 97, 23);
    contentPane.add(chckbxNewCheckBox);

    chckbxNewCheckBox_1 = new JCheckBox("Not Employeed");
    chckbxNewCheckBox_1.setBounds(506, 33, 97, 23);
    contentPane.add(chckbxNewCheckBox_1);

    chckbxNewCheckBox_2 = new JCheckBox("Self Employeed");
    chckbxNewCheckBox_2.setBounds(506, 59, 97, 23);
    contentPane.add(chckbxNewCheckBox_2);

}

}

GridBagLayout的示例：

这是GridBagLayout的一个示例。组件正确调整大小，但我没有看到增长属性。它必须自动完成。

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

public class GridBagLayoutDemo {
    final static boolean shouldFill = true;
    final static boolean shouldWeightX = true;
    final static boolean RIGHT_TO_LEFT = false;

    public static void addComponentsToPane(Container pane) {
    JButton button;
    pane.setLayout(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();

    button = new JButton("Button 1");
    if (shouldWeightX) {
    c.weightx = 0.5;
    }
    c.fill = GridBagConstraints.HORIZONTAL;
    c.gridx = 0;
    c.gridy = 0;
    pane.add(button, c);

    button = new JButton("Button 2");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.weightx = 0.5;
    c.gridx = 1;
    c.gridy = 0;
    pane.add(button, c);

    button = new JButton("Button 3");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.weightx = 0.5;
    c.gridx = 2;
    c.gridy = 0;
    pane.add(button, c);

    button = new JButton("Long-Named Button 4");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.ipady = 40;      //make this component tall
    c.weightx = 0.0;
    c.gridwidth = 3;
    c.gridx = 0;
    c.gridy = 1;
    pane.add(button, c);

    button = new JButton("5");
    c.fill = GridBagConstraints.HORIZONTAL;
    c.ipady = 0;       //reset to default
    c.weighty = 1.0;   //request any extra vertical space
    c.anchor = GridBagConstraints.PAGE_END; //bottom of space
    c.insets = new Insets(10,0,0,0);  //top padding
    c.gridx = 1;       //aligned with button 2
    c.gridwidth = 2;   //2 columns wide
    c.gridy = 2;       //third row
    pane.add(button, c);
    }

    private static void createAndShowGUI() {
        JFrame frame = new JFrame("GridBagLayout");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        addComponentsToPane(frame.getContentPane());
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        createAndShowGUI();
    }
}

Answer 1

使用布局管理器，如GridBagLayout，其列的属性调用“增长”。

想用窗口调整组件大小？

1 个答案: