使用GridBagLayout

Question

我以前從未使用過布局，據我所知， GridBagLayout可能不是最容易上手的布局，但是無論如何我都在嘗試使用它。 我正在嘗試為我的JPanel使用GridBagLayout ，以便當我調整其大小時，組件會增加。 我只需要它來保持組件的自然高度，但是我試圖使用GridBagConstraints.HORIZONTAL來自動調整組件的寬度。 我有代碼

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.font.*;
import java.io.*;

public class NumberConverterDesignTest
{
    JFrame numberConversionWindow = new JFrame("Number Conversion");

    JPanel  numberPanel = new JPanel();

    ////////COMPONENTS////////
    JLabel lblTitle;
    JLabel lblBase2;
    JLabel lblBase8;
    JLabel lblBase10;
    JLabel lblBase16;
    JTextField txtBase2;
    JTextField txtBase8;
    JTextField txtBase10;
    JTextField txtBase16;

    ///////////Font///////////
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    String []fontFamilies = ge.getAvailableFontFamilyNames();
    Font FontT5 = new Font("SansSerif", Font.BOLD, 45);

    public void numberConvertGUI()
    {
        numberConversionWindow.setBounds(10, 10, 420, 300);

        numberConversionWindow.setMinimumSize(new Dimension(420, 300));

        numberConversionWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        numberConversionWindow.setLayout(new GridLayout(1,1));

        createNumberConversionPanel();

        numberConversionWindow.getContentPane().add(numberPanel);

        numberConversionWindow.setVisible(true);
    }

    public void createNumberConversionPanel()
    {
        numberPanel.setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();

        lblTitle = new JLabel();
        c.weightx = 0.5;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = 2;
        lblTitle.setText("Number Converter");
        lblTitle.setHorizontalAlignment(JLabel.CENTER);
        lblTitle.setFont(FontT5);
        numberPanel.add(lblTitle, c);

        lblBase2 = new JLabel();
        c.weightx = 0.0;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 1;
        lblBase2.setText("Binary: ");
        lblBase2.setHorizontalAlignment(JLabel.RIGHT);
        numberPanel.add(lblBase2);

        lblBase8 = new JLabel();
        //c.weightx = 0.5;
        c.weighty = 1.0;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 2;
        lblBase8.setText("Octal: ");
        lblBase8.setHorizontalAlignment(JLabel.RIGHT);
        numberPanel.add(lblBase8);

        lblBase10 = new JLabel();
        c.weightx = 0.5;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 3;
        lblBase10.setText("Decimal: ");
        lblBase10.setHorizontalAlignment(JLabel.RIGHT);
        numberPanel.add(lblBase10);

        lblBase16 = new JLabel();
        c.weightx = 0.5;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 4;
        lblBase16.setText("Hexadecimal: ");
        lblBase16.setHorizontalAlignment(JLabel.RIGHT);
        numberPanel.add(lblBase16);

        txtBase2 = new JTextField();
        c.weightx = 0.0;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 1;
        c.gridy = 1;
        txtBase2.setText("");
        numberPanel.add(txtBase2);

        txtBase8 = new JTextField();
        //c.weightx = 0.5;
        c.weighty = 1.0;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 1;
        c.gridy = 2;
        txtBase8.setText("");
        numberPanel.add(txtBase8);

        txtBase10 = new JTextField();
        c.weightx = 0.5;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 1;
        c.gridy = 3;
        txtBase10.setText("");
        numberPanel.add(txtBase10);

        txtBase16 = new JTextField();
        c.weightx = 0.5;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 1;
        c.gridy = 4;
        txtBase16.setText("");
        numberPanel.add(txtBase16);
    }

    public static void main(String[] args)
    {
        NumberConverterDesignTest nC = new NumberConverterDesignTest();
        nC.numberConvertGUI();
    }
}

當編譯時我得到

我的目的是嘗試

我相信問題就是我將weightx設置為什么，但是我不確定將其設置為什么，以獲得我想要的結果。 任何幫助將不勝感激

Answer 1

每次調用numberPanel.add方法時，都需要傳遞更新的約束。