Java:JPanel中的垂直对齐

Question

我试图在一个JPanel中垂直对齐(居中)两个JLabel.

JPanel panel = new JPanel();
panel.setPreferredSize(size);
JLabel label1 = new JLabel(icon);
JLabel label2 = new JLabel("text");
panel.add(label1);
panel.add(label2);

我尝试过使用setAligmentY()但没有成功.两个标签始终显示在JPanel的顶部.

UPD:标签应该像使用FlowLayout一样位于彼此旁边,但是在JPanel的中间.

Answer 1

使用GridBagLayout带有默认约束的a.这是一个小的演示代码:

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class TestVerticalAlignement {

    protected void initUI() {
        final JFrame frame = new JFrame();
        frame.setTitle("Test vertical alignement");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        JLabel label1 = new JLabel("label1");
        JLabel label2 = new JLabel("label2");
        panel.add(label1, gbc);
        panel.add(label2, gbc);
        frame.add(panel);
        frame.setSize(300, 300);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new TestVerticalAlignement().initUI();
            }
        });
    }

}

Answer 2

你可以看到这个答案:https: //stackoverflow.com/a/18073909/189411

JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));