Java GridBagLayout - 禁用垂直填充

Question

我在 GridBagLayout-GUI 中遇到垂直填充问题。这是代码:

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

public class Spielklasse {

public static void main(String[] args) {

    JPanel page = new JPanel();
    page.setLayout(new GridBagLayout());

    for (int i = 0; i < 5; i++) {
        JPanel subPanel = new JPanel(new BorderLayout());
        JLabel label = new JLabel();
        label.setText("label " + i + ":");
        JTextField textField = new JTextField();
        textField.setPreferredSize(new Dimension(120,20));

        subPanel.add(label, BorderLayout.WEST);
        subPanel.add(textField, BorderLayout.EAST);

        GridBagConstraints c = new GridBagConstraints();
        c.anchor = GridBagConstraints.NORTHWEST;
        c.gridx = 1;
        c.gridy = i;
        c.weightx = 1;
        c.weighty = 1;
        c.insets = new Insets(10, 20, 10, 20);
        c.fill = GridBagConstraints.HORIZONTAL;
        page.add(subPanel, c);
    }

    JScrollPane scrollPane = new JScrollPane(page);

    JFrame frame = new JFrame();
    frame.setSize(300,500);
    frame.add(scrollPane);
    frame.setVisible(true);
}
}

我想在前面的标签下面直接放置标签+文本字段，而不填充它们之间的垂直空间(就像当您垂直调整我的示例大小时直到您可以看到垂直滚动条)。我怎样才能做到这一点？使用我的代码，整个面板都是垂直填充的，但我不希望这样。

Answer 1

删除下一行c.weighty = 1;。

阅读更多 docs .

编辑:在循环后使用虚拟 JLabel 获取可用空间:

GridBagConstraints c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 5;
c.fill = GridBagConstraints.BOTH;
c.weightx=1;
c.weighty=1;
c.gridwidth = 2;
page.add(new JLabel(" "),c);