JAVA之网格布局管理器中JSeparator的使用以及GridBagLayout的注意细节
1.通过下面的例子，我们可以看到，网格布局面板中添加分割线的方法是：
package Project;import java.awt.*;import java.util.Date;import javax.swing.*;public class Table3 extends JFrame{public Table3(){Container container = getContentPane();container.setLayout(new GridBagLayout());GridBagConstraints grid1 = new GridBagConstraints();grid1.gridx = 0;grid1.gridy = 0;grid1.weightx = 1;//该列所有网格都设置为水平方向自动扩充grid1.insets = new Insets(0, 5, 0, 5);JLabel label1 = new JLabel("没有任何窗口打开");GridBagConstraints grid2 = new GridBagConstraints();grid2.gridx = 1;grid2.gridy = 0;grid2.fill = GridBagConstraints.VERTICAL;//去掉该语句，面板添加的分割线不显示grid2.insets = new Insets(0, 5, 0, 5);JSeparator separator2 = new JSeparator();//创建竖直分隔线separator2.setOrientation(JSeparator.VERTICAL);GridBagConstraints grid3 = new GridBagConstraints();grid3.gridx = 2;grid3.gridy = 0;//grid3.weighty = 1;//设置该行所有网格在竖直方向上自动扩展grid3.insets = new Insets(0, 5, 0, 5);JLabel label3 = new JLabel("操作员:");GridBagConstraints grid4 = new GridBagConstraints();grid4.gridx = 3;grid4.gridy = 0;grid4.fill = GridBagConstraints.VERTICAL;grid4.insets = new Insets(0, 5, 0, 5);JSeparator separator4 = new JSeparator();//创建竖直分隔线separator4.setOrientation(JSeparator.VERTICAL);GridBagConstraints grid5 = new GridBagConstraints();grid5.gridx = 4;grid5.gridy = 0;grid5.insets = new Insets(0, 5, 0, 5);Date date = new Date();JLabel label5 = new JLabel(String.format("%tF", date));GridBagConstraints grid6 = new GridBagConstraints();grid6.gridx = 5;grid6.gridy = 0;grid6.fill = GridBagConstraints.VERTICAL;grid6.insets = new Insets(0, 5, 0, 5);JSeparator separator6 = new JSeparator();//创建竖直分隔线separator6.setOrientation(JSeparator.VERTICAL);GridBagConstraints grid7 = new GridBagConstraints();grid7.gridx = 6;grid7.gridy = 0;grid7.insets = new Insets(0, 5, 0, 5);JLabel label7 = new JLabel("**公司进销存管理系统");container.add(label1, grid1);container.add(separator2, grid2);container.add(label3, grid3);container.add(separator4, grid4);container.add(label5, grid5);container.add(separator6, grid6);container.add(label7, grid7);setVisible(true);setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);setBounds(350, 150, 800, 200);}public static void main (String []args){Table3 table = new Table3();}}