import java.awt.BorderLayout;
import java.awt.FlowLayout;
import javax.swing.*;
public class FileCutter
{
public static void main(String[] args)
{
CutterWindow cw = new CutterWindow();
cw.setResizable(false);
cw.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
cw.setVisible(true);
}
}
class CutterWindow extends JFrame
{
private JTabbedPane tabbedPane = new JTabbedPane();
public static final int DEFAULT_WIDTH = 470;
public static final int DEFAULT_HEIGHT = 480;
public CutterWindow()
{
this.setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
tabbedPane.add("File Cut",new FileCutPanel());
this.add(tabbedPane);
}
}
class FileCutPanel extends JPanel
{
private JLabel lblFileName = new JLabel("File Name:");
private JTextField txtFileName = new JTextField();
private JLabel lblFileSize = new JLabel("File Size:");
private JTextField txtFileSize = new JTextField();
private JButton btnViewFiles = new JButton("...");
private JPanel panelSelectOperatingFile = new JPanel();
public FileCutPanel()
{
panelSelectOperatingFile.setLayout(new FlowLayout());
panelSelectOperatingFile.add(lblFileName);
txtFileName.setColumns(20);
txtFileName.setEditable(false);
panelSelectOperatingFile.add(txtFileName);
panelSelectOperatingFile.add(btnViewFiles);
panelSelectOperatingFile.add(lblFileSize);
panelSelectOperatingFile.add(txtFileSize);
txtFileSize.setColumns(20);
txtFileSize.setEditable(false);
this.add(panelSelectOperatingFile);
}
}
结果是panelSelectOperatingFile面板中的五个组件位于同一行并超出了窗口的宽度。我知道JPanel的默认布局是flowlayout
,我预计当前一行中没有空格时,组件将被放入下一行。我试图弄清楚问题,但我不能
答案 0 :(得分:2)
请勿使用panelSelectOperatingFile
面板。只需将您的组件添加到您要扩展的JPanel
。
您无法嵌套FlowLayouts。原因如下: