Java 如何删除JMenu项中的空格
到现在为止,我有这个 这是我的Java 如何删除JMenu项中的空格,java,swing,user-interface,jpanel,jmenuitem,Java,Swing,User Interface,Jpanel,Jmenuitem,到现在为止,我有这个 这是我的MyFrame1的源代码: import java.awt.EventQueue; import java.awt.GridLayout; import java.awt.Insets; import java.awt.Color; import java.awt.Color.*; import java.awt.Font; import java.awt.Font.*; import java.io.*; import java.io.BufferedReader
MyFrame1
的源代码:
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Color;
import java.awt.Color.*;
import java.awt.Font;
import java.awt.Font.*;
import java.io.*;
import java.io.BufferedReader;
import java.io.FileReader;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
public class Test
{
public static void main(String[] args)
{
new Test();
}
public Test()
{
String line = "";
EventQueue.invokeLater(new Runnable()
{
@Override
public void run()
{
try
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e)
{
e.printStackTrace();
}
JMenuBar mBar = new JMenuBar();
//creating new JMenuItem
JMenuItem mHelp = new JMenuItem("Help");
JMenuItem mCredits = new JMenuItem("Credits");
JMenuItem mExit = new JMenuItem("Exit");
/*try
{
BufferedReader br = new BufferedReader(new FileReader("1.txt"));
line = br.readLine();
}
catch(Exception e)
{
e.printStackTrace();
}*/
JLabel jUser = new JLabel("User is: " );
mHelp.setOpaque(false);
mHelp.setForeground(Color.DARK_GRAY);
mHelp.setFont(new Font("Verdana", Font.PLAIN,12));
mCredits.setOpaque(false);
mCredits.setForeground(Color.DARK_GRAY);
mCredits.setFont(new Font("Verdana", Font.PLAIN,12));
mExit.setOpaque(false);
mExit.setForeground(Color.DARK_GRAY);
mExit.setFont(new Font("Verdana", Font.PLAIN,12));
mBar.add(mHelp);
mBar.add(mCredits);
mBar.add(mExit);
mBar.add(jUser);
//mBar.add(line);
JFrame frame = new JFrame("MYFRAME");
frame.setJMenuBar(mBar);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setResizable(false);
}
});
}
public class TestPane extends JPanel
{
public TestPane()
{
setBorder(new EmptyBorder(20, 20, 20, 20));
setLayout(new GridLayout(3, 3, 60, 60));
add(makeButton("Account Code"));
add(makeButton("Unit Details"));
add(makeButton("Item Details"));
add(makeButton("Clearing"));
add(makeButton("Search"));
add(makeButton("Exit"));
}
protected JButton makeButton(String text)
{
JButton btn = new JButton(text);
btn.setFont(new Font("Verdana", Font.PLAIN,18));
btn.setMargin(new Insets(30, 30, 30, 30));
btn.setBackground(Color.blue);
btn.setOpaque(true);
btn.setBorderPainted(false);
return btn;
}
}
}
我还是个新手,对Java和GUI仍有一点了解。我仍然在学习它,所以我在我的程序上做试错。
我试过使用UIManager或UILayout,但仍然不适合我,或者我仍然不知道如何使用它。
我真的很想学习更多关于GUI和Java的知识,请帮助我。任何意见、评论、建议都将被接受并受到赞赏
我的框架1:
至于我的目标是这种产品的产量,请。请看下一张图片
我的愿望输出:
另外,如果你注意到有一个bufferedReader,我正在练习用字符串读取“1.txt”,并将其作为标签或(仍然不知道)放在菜单栏中 您应该将
JMenuItem
s添加到JMenu
对象中,然后将JMenu
s添加到JMenuBar
中
JMenuBar mBar = new JMenuBar();
//creating new JMenuItem
JMenuItem mHelp = new JMenuItem("Help");
JMenu help = new JMenu("Help");
help.add(mHelp);
JMenuItem mCredits = new JMenuItem("Credits");
JMenu credits = new JMenu("Credits");
credits.add(mCredits);
JMenuItem mExit = new JMenuItem("Exit");
JMenu exit = new JMenu("Exit");
exit.add(exit);
/*try
{
BufferedReader br = new BufferedReader(new FileReader("1.txt"));
line = br.readLine();
}
catch(Exception e)
{
e.printStackTrace();
}*/
JLabel jUser = new JLabel("User is: " );
mHelp.setOpaque(false);
mHelp.setForeground(Color.DARK_GRAY);
mHelp.setFont(new Font("Verdana", Font.PLAIN,12));
mCredits.setOpaque(false);
mCredits.setForeground(Color.DARK_GRAY);
mCredits.setFont(new Font("Verdana", Font.PLAIN,12));
mExit.setOpaque(false);
mExit.setForeground(Color.DARK_GRAY);
mExit.setFont(new Font("Verdana", Font.PLAIN,12));
mBar.add(help);
mBar.add(credits);
mBar.add(exit);
但是将JLabel
添加到JMenuBar
不是一个好主意。如果您想在问题中描述类似的内容,您可能需要将JPanel
添加到框架的north
区域,然后将用户标签添加到FlowLayout。该面板的拖尾
区域:
mBar.add(help);
mBar.add(credits);
mBar.add(exit);
//mBar.add(jUser);
//mBar.add(line);
JPanel statusPanel = new JPanel(new FlowLayout(FlowLayout.TRAILING));
statusPanel.add(jUser);
statusPanel.add(new JLabel("Loen Seto"));
JFrame frame = new JFrame("MYFRAME");
frame.setJMenuBar(mBar);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(statusPanel, BorderLayout.NORTH);
frame.add(new TestPane(), BorderLayout.CENTER);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setResizable(false);
祝您好运您应该将
JMenuItem
s添加到JMenu
对象中,然后将JMenu
s添加到JMenuBar
中
JMenuBar mBar = new JMenuBar();
//creating new JMenuItem
JMenuItem mHelp = new JMenuItem("Help");
JMenu help = new JMenu("Help");
help.add(mHelp);
JMenuItem mCredits = new JMenuItem("Credits");
JMenu credits = new JMenu("Credits");
credits.add(mCredits);
JMenuItem mExit = new JMenuItem("Exit");
JMenu exit = new JMenu("Exit");
exit.add(exit);
/*try
{
BufferedReader br = new BufferedReader(new FileReader("1.txt"));
line = br.readLine();
}
catch(Exception e)
{
e.printStackTrace();
}*/
JLabel jUser = new JLabel("User is: " );
mHelp.setOpaque(false);
mHelp.setForeground(Color.DARK_GRAY);
mHelp.setFont(new Font("Verdana", Font.PLAIN,12));
mCredits.setOpaque(false);
mCredits.setForeground(Color.DARK_GRAY);
mCredits.setFont(new Font("Verdana", Font.PLAIN,12));
mExit.setOpaque(false);
mExit.setForeground(Color.DARK_GRAY);
mExit.setFont(new Font("Verdana", Font.PLAIN,12));
mBar.add(help);
mBar.add(credits);
mBar.add(exit);
但是将JLabel
添加到JMenuBar
不是一个好主意。如果您想在问题中描述类似的内容,您可能需要将JPanel
添加到框架的north
区域,然后将用户标签添加到FlowLayout。该面板的拖尾
区域:
mBar.add(help);
mBar.add(credits);
mBar.add(exit);
//mBar.add(jUser);
//mBar.add(line);
JPanel statusPanel = new JPanel(new FlowLayout(FlowLayout.TRAILING));
statusPanel.add(jUser);
statusPanel.add(new JLabel("Loen Seto"));
JFrame frame = new JFrame("MYFRAME");
frame.setJMenuBar(mBar);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(statusPanel, BorderLayout.NORTH);
frame.add(new TestPane(), BorderLayout.CENTER);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setResizable(false);
祝你好运首先你必须知道这些 JMenuBar: 菜单栏的一种实现。您可以将JMenu对象添加到菜单栏 构造菜单 JMenu: 菜单的一种实现--包含菜单项的弹出窗口 当用户在JMenuBar上选择一个项目时显示 JMenuItem: 菜单中某项的实现
因此,将您的
JMenuItem
s添加到JMenu
,稍后将此JMenu
添加到JMenuBar
JMenuBar mBar = new JMenuBar();
//creating new JMenuItem
JMenuItem mHelp = new JMenuItem("Help");
JMenu help = new JMenu("Help");
help.add(mHelp);
JMenuItem mCredits = new JMenuItem("Credits");
JMenu credits = new JMenu("Credits");
credits.add(mCredits);
JMenuItem mExit = new JMenuItem("Exit");
JMenu exit = new JMenu("Exit");
exit.add(exit);
/*try
{
BufferedReader br = new BufferedReader(new FileReader("1.txt"));
line = br.readLine();
}
catch(Exception e)
{
e.printStackTrace();
}*/
JLabel jUser = new JLabel("User is: " );
mHelp.setOpaque(false);
mHelp.setForeground(Color.DARK_GRAY);
mHelp.setFont(new Font("Verdana", Font.PLAIN,12));
mCredits.setOpaque(false);
mCredits.setForeground(Color.DARK_GRAY);
mCredits.setFont(new Font("Verdana", Font.PLAIN,12));
mExit.setOpaque(false);
mExit.setForeground(Color.DARK_GRAY);
mExit.setFont(new Font("Verdana", Font.PLAIN,12));
mBar.add(help);
mBar.add(credits);
mBar.add(exit);
输出:
首先,你必须知道这些 JMenuBar: 菜单栏的一种实现。您可以将JMenu对象添加到菜单栏 构造菜单 JMenu: 菜单的一种实现--包含菜单项的弹出窗口 当用户在JMenuBar上选择一个项目时显示 JMenuItem: 菜单中某项的实现
因此,将您的
JMenuItem
s添加到JMenu
,稍后将此JMenu
添加到JMenuBar
JMenuBar mBar = new JMenuBar();
//creating new JMenuItem
JMenuItem mHelp = new JMenuItem("Help");
JMenu help = new JMenu("Help");
help.add(mHelp);
JMenuItem mCredits = new JMenuItem("Credits");
JMenu credits = new JMenu("Credits");
credits.add(mCredits);
JMenuItem mExit = new JMenuItem("Exit");
JMenu exit = new JMenu("Exit");
exit.add(exit);
/*try
{
BufferedReader br = new BufferedReader(new FileReader("1.txt"));
line = br.readLine();
}
catch(Exception e)
{
e.printStackTrace();
}*/
JLabel jUser = new JLabel("User is: " );
mHelp.setOpaque(false);
mHelp.setForeground(Color.DARK_GRAY);
mHelp.setFont(new Font("Verdana", Font.PLAIN,12));
mCredits.setOpaque(false);
mCredits.setForeground(Color.DARK_GRAY);
mCredits.setFont(new Font("Verdana", Font.PLAIN,12));
mExit.setOpaque(false);
mExit.setForeground(Color.DARK_GRAY);
mExit.setFont(new Font("Verdana", Font.PLAIN,12));
mBar.add(help);
mBar.add(credits);
mBar.add(exit);
输出:
太好了,谢谢。如何在帧的北部区域创建JPanel,然后在该面板的东部添加jlabel?你能告诉我怎么做吗?太好了,谢谢。如何在帧的北部区域创建JPanel,然后在该面板的东部添加jlabel?你能告诉我怎么做吗?