对于垂直对齐，创建一个框架并使用 BoxLayout 管理器设置布局 - JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.Y_AXIS)); 上面，我们设置了 BoxLayout 来设置对齐方式，因为它是一个允许将多个组件垂直或水平排列的布局管理器。我们在这里设置了垂直对齐方式 - BoxLayout.X_AXIS 以下是如何设置组件垂直对齐方式的示例 - 示例 package my; import java.awt.Component; import java.awt.Dimension; import javax.swing.BorderFactory; import javax.swing.BoxLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class SwingDemo { public static void main(String[] args) { JFrame frame ... 阅读更多

要在 Java 中创建无边框窗口，请不要装饰窗口。以下是创建无边框窗口的示例 - 示例 package my; import java.awt.GraphicsEnvironment; import java.awt.GridLayout; import java.awt.Point; import javax.swing.JLabel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.JWindow; import javax.swing.SwingConstants; public class SwingDemo { public static void main(String[] args) throws Exception { JWindow frame = new JWindow(); JLabel label1, label2, label3; frame.setLayout(new GridLayout(2, 2)); label1 = new JLabel("Id", SwingConstants.CENTER); label2 = new JLabel("Age", SwingConstants.CENTER); label3 = new JLabel("Password", SwingConstants.CENTER); ... 阅读更多

我们首先设置了一个组件 - GridBagConstraints constraints = new GridBagConstraints(); constraints.gridy = 0; panel.add(new JButton("First row"), constraints); 现在，我们将它放在先前添加的组件旁边 - constraints.gridx = GridBagConstraints.RELATIVE; constraints.gridy = 1; panel.add(new JButton("2nd row 1st column"), constraints); panel.add(new JButton("2nd row 2nd column"), constraints); 示例 package my; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(); panel.setLayout(new GridBagLayout()); GridBagConstraints constraints = new ... 阅读更多

要添加具有相对 X 位置的组件，请使用 GridBagConstraints.RELATIVE 常量。将其设置为 gridx 字段 - GridBagConstraints constraints = new GridBagConstraints(); constraints.gridx = GridBagConstraints.RELATIVE; 以下是如何在 Java 中添加具有相对 X 位置的组件的示例 - 示例 package my; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(); panel.setLayout(new GridBagLayout()); GridBagConstraints constraints = new GridBagConstraints(); constraints.gridy = ... 阅读更多

要使用 GridBagLayout 禁止调整组件大小，请使用 GridBagConstraints NONE 常量 - GridBagConstraints gbc = new GridBagConstraints(); gbc.fill = GridBagConstraints.NONE; 以下是使用 GridBagLayout 禁止调整组件大小的示例 - 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(); gbc.fill = GridBagConstraints.NONE; ... 阅读更多

要分配额外的水平和垂直空间，请使用 weightx 和 weighty 字段。以下是分配额外水平和垂直空间的示例 - 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: "); ... 阅读更多

创建一个面板并设置布局 - JPanel panel = new JPanel(); GridBagLayout layout = new GridBagLayout(); panel.setLayout(layout); 现在，设置约束以及 columnWeights 和 rowWeights - 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中 - gbc.gridx = 0; gbc.gridy = 0; layout.setConstraints(label, gbc); panel.add(label); 以下是如何在 GridBagLayout 中设置 columnWeights 和 rowWeights 的示例 - 示例 package my; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.JFrame; import ... 阅读更多

要在 Java 中居中窗口，请使用 getCenterPoint() 方法。设置宽度和高度，并使用以下公式设置边界 - Point center = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint(); int width = 500; int height = 200; frame.setBounds(center.x - width / 2, center.y - height / 2, width, height); 以下是如何居中窗口的示例 - 示例 package my; import java.awt.GraphicsEnvironment; import java.awt.GridLayout; import java.awt.Point; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame.setDefaultLookAndFeelDecorated(true); JFrame frame = new JFrame("Register!"); ... 阅读更多

本文将学习如何在 Java Swing 中使用 BoxLayout 布局管理器设置 JFrame 内面板的首选大小。通过设置面板的首选大小和最大大小，我们可以控制布局的外观，确保在添加其他组件时面板保持一致的大小。这种方法在以结构化格式垂直或水平排列元素且具有特定大小要求时非常有用。设置 BoxLayout 管理器首选大小的步骤 以下是在 Java 中设置 BoxLayout 管理器首选大小的步骤：... 阅读更多

要组合这两种布局，我们创建了两个面板：Frame f = new JFrame("Combining Layouts"); JPanel panel1 = new JPanel(); JPanel panel2 = new JPanel(); 然后，相应地设置布局：panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS)); panel2.setLayout(new FlowLayout()); 之后，将组件添加到两个面板后，再将它们添加到框架中：f.add(panel1, BorderLayout.WEST); f.add(panel2, BorderLayout.CENTER);示例代码包 my; import java.awt.BorderLayout; import java.awt.Color; import java.awt.FlowLayout; import javax.swing.BoxLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextArea; public class SwingDemo {    public static void main(String[] args) {       JFrame f = new JFrame("Combining Layouts");       JPanel panel1 = new JPanel();       ... 阅读更多