我正在尝试创建一个Java桌面应用程序,我使用两个按钮.我想在这些按钮中添加悬停效果.我想:当我点击任何按钮时,它应该改变它的背景颜色.
我怎样才能实现它?
这是我的代码:
public class Party1Party2 extends JFrame
{
JButton b1;
JButton b2;
Container pane;
public Party1Party2()
{
getContentPane().setBackground(new java.awt.Color(255, 255, 255));
b2.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
JOptionPane.showMessageDialog(frame, "Welcome to allhabad High Court");
}
});
b1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
JOptionPane.showMessageDialog(frame, "Welcome to allhabad High Court");
}
});
}
}
Run Code Online (Sandbox Code Playgroud) 嗨,我正在尝试制作 Java 桌面应用程序,其中我使用多个 jlabel 我想在每个标签之间留出很小的空间
我怎样才能做到这一点
这是我的代码
public class Second extends javax.swing.JFrame {
JLabel label=new JLabel();
/**
* Creates new form Second
*/
public Second() {
this.getContentPane().setBackground(new java.awt.Color(255, 140, 0));
this.setExtendedState(JFrame.MAXIMIZED_BOTH);
this.setUndecorated(true);
JButton print= new JButton();
print.setBackground(new java.awt.Color(153, 153, 0));
print.setOpaque(true);
print.setBounds(525,1282,130,85);
print.setFont(new java.awt.Font("Times New Roman", 1, 24)); // NOI18N
print.setForeground(new java.awt.Color(255,255,255));
print.setText("Print");
this.add(print);
JButton home= new JButton();
home.setBackground(new java.awt.Color(153, 153, 0));
home.setOpaque(true);
home.setBounds(640,1282,130,85);
home.setFont(new java.awt.Font("Times New Roman", 1, 24)); // NOI18N
home.setForeground(new java.awt.Color(255, 255,255 ));
home.setText("Home");
this.add(home);
int Height …Run Code Online (Sandbox Code Playgroud) 我有一个字符串,其中包含数字和单词,我想在java中使用正则表达式.
String s="S.No.DistrictMarketPrice 1 Agra Achhnera NIL 2 Agra Agra 1450 3 Agra Fatehabad NIL 4 Agra Fatehpur Sikri 8765 5 Agra Jagner NIL 6 Agra Jarar NIL 7 Agra Khairagarh NIL 8 Agra Shamshabad NIL 9 Aligarh Atrauli 1298 10 Aligarh Chharra NIL";
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我想打破这个字符串.我希望新行中的每个字符串都应该从精确的serino开始
我怎样才能得到这个输出
S.No .District Market Price
1 Agra Achhnera NIL
2 Agra Agra 1450
3 Agra Fatehabad NIL
4 Agra Fatehpur Sikri 8765
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