符合对象和类关系的是( )。
A.人和老虎
B.书和汽车
C.楼和土地
D.汽车和交通工具
- · 有3位网友选择 C,占比33.33%
- · 有2位网友选择 B,占比22.22%
- · 有2位网友选择 D,占比22.22%
- · 有2位网友选择 A,占比22.22%
A.人和老虎
B.书和汽车
C.楼和土地
D.汽车和交通工具
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ButtonTestApplet extends JApplet
{
public void init()
{
ButtonPanel buttonpanel = new ButtonPanel();
Container container = getContentPane();
container.add(buttonpane1);
}
}
class ButtonPanel extends JPanel
{
private class ColorAction implements ActionListener
{
private Color backgroundColor;
public void actionPerformed(ActionEvent actionevent)
{
setBackground(backgroundColor);
repaint();
}
public ColorAction(Color color)
{
backgroundColor = color;
}
}
public ButtonPanel()
{
JButton jbutton = new JButton("橙色");
jbutton.setForeground(Color.blue);
jbutton.setFont((______) ("隶书",Font.ITALIC,32))
JButton jbutton1 = new JButton("蓝色");
Jbutton1.setForeground(Color.blue);
jbutton.setFont((______) ("隶书",Font.ITALIC,32))
JButton jbutton2 = new JButton("红色");
Jbutton2.setForeground(Color.blue);
jbutton.setFont ((______) ("隶书",Font.ITALIC,32) )
add(jbutton) ;
add(jbuttonl) ;
add(jbutton2) ;
ColorAction coloraction = new ColorAction(Color.orange);
ColorAction coloractionl = new ColorAction(Color.blue);
ColorAction coloraction2 = new ColorAction(Color.red);
jbutton.addActionListener((______));
jbuttonl.addActionListener((______));
jbutton2.addActionListener((______));
}
}
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