Java 为JPanel定制宽度和高度_Java_Swing_Jpanel_Layout Manager

Java 为JPanel定制宽度和高度

java swing

Java 为JPanel定制宽度和高度,java,swing,jpanel,layout-manager,Java,Swing,Jpanel,Layout Manager,为什么我的JPanel在我尝试调整大小到我想要的大小时，会散布到框架的其余部分这是代码片段 public class GUITabbedPane extends JFrame{ TabsPanelClasses tabPanel = new TabsPanelClasses(); public GUITabbedPane() { TabsPanelClasses.CreateAccount createAccount = tabPanel.new CreateAccount();

为什么我的JPanel在我尝试调整大小到我想要的大小时，会散布到框架的其余部分

这是代码片段

public class GUITabbedPane extends JFrame{

TabsPanelClasses tabPanel = new TabsPanelClasses();
public GUITabbedPane()
{
    TabsPanelClasses.CreateAccount createAccount = tabPanel.new  CreateAccount();
    TabsPanelClasses.BorrowBook borrowBook = tabPanel.new  BorrowBook();

    JTabbedPane tabs = new JTabbedPane(JTabbedPane.LEFT);

    //Tab text support html tags
    tabs.addTab("<html><body marginwidth=30 marginheight=20>Create Account</body></html>", null,createAccount.createAccountPanel(),"New Member Account");
    tabs.addTab("<html><body marginwidth=30 marginheight=20>Borrow Book</body></html>", null,borrowBook.borrowBookInputs(),"Borrowing a book");
    tabs.addTab("<html><body marginwidth=30 marginheight=20>Return Book</body></html>", null,null,"Returning a book");
    tabs.addTab("<html><body marginwidth=30 marginheight=20>Add Book</body></html>", null,null,"Adding a book record");
    tabs.addTab("<html><body marginwidth=30 marginheight=20>Delete Book</body></html>", null,null,"Deleting a book record");
    tabs.addTab("<html><body marginwidth=30 marginheight=20>Display Details</body></html>", null,null,"Books and Members details");

    add(tabs);
    pack();

}
public static void main(String[] args) {
    GUITabbedPane frame = new GUITabbedPane();

    frame.setDefaultLookAndFeelDecorated(true);
    frame.setSize(800, 400);
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
}

}

同时设置框架的布局：

frame.setLayout(LayoutManager);

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public

类。您（错误地）认为哪个代码是SSCCE？

frame.setLayout(LayoutManager);