如何在 GridBagLayout 中设置列权重和行权重?
java 8object oriented programmingprogramming
创建面板并设置布局 −
JPanel panel = new JPanel(); GridBagLayout layout = new GridBagLayout(); panel.setLayout(layout);
现在，设置约束，并设置列权重和行权重 −
GridBagConstraints gbc = new GridBagConstraints();
JLabel label = new JLabel("Rank: ");
JTextArea text = new JTextArea();
text.setText("Add rank here...");
layout.columnWeights = new double[]{0.0f, 0.0f, 2.0f};
layout.rowWeights = new double[]{0.0f, 1.0f};
现在，设置标签的约束并将其添加到面板 −
gbc.gridx = 0; gbc.gridy = 0; layout.setConstraints(label, gbc); panel.add(label);
以下是在 GridBagLayout 中设置列权重和行权重的示例 −
示例
package my;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.WindowConstants;
public class SwingDemo {
public static void main(String[] args) {
JFrame frame = new JFrame("Demo Frame");
JPanel panel = new JPanel();
GridBagLayout layout = new GridBagLayout();
panel.setLayout(layout);
GridBagConstraints gbc = new GridBagConstraints();
JLabel label = new JLabel("Rank: ");
JTextArea text = new JTextArea();
text.setText("Add rank here...");
layout.columnWeights = new double[]{0.0f, 0.0f, 2.0f};
layout.rowWeights = new double[]{0.0f, 1.0f};
gbc.gridx = 0;
gbc.gridy = 0;
layout.setConstraints(label, gbc);
panel.add(label);
gbc.gridx = 1;
gbc.gridy = 1;
layout.setConstraints(text, gbc);
panel.add(text);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(panel);
frame.setSize(550, 400);
frame.setVisible(true);
}
}
输出
