public class Java_1 extends TT
{
//*********Found**********
public static void main(String args[])
{
Java_1 t = new Java_1("小龙");
}
public Java_1(String s)
{
super(s);
System.out.println("您好吗?");
}
public Java_1()
{
this("我是文朋");
}
}
class TT
{
public TT()
{
System.out.println("多高兴啊!");
}
public TT(String s)
{
//*********Found**********
this();## Java_1继承了TT类,按题目要求输出循序,应先输出TT类中无构造函数
System.out.println("我是"+s);
}
}
### 考察triple,有小数则,double;主函数条用了triple
public class Java_2
{
public static void main(String[] args)
{
System.out.println("观察triple方法参数 double 10.0 的改变:");
//*********Found**********
double canshu = 10;
//*********Found**********
System.out.println("参数*3前,参数值为 " +canshu);
triple(canshu);
System.out.println("在triple方法外,参数值仍为 " + canshu);
System.out.println("思考:方法能否改变参数值?");
}
//*********Found**********
public static void triple(double x)
{
//*********Found**********
x = x * 3;
//*********Found**********
System.out.println("在triple方法内,参数 10 变为 " + x);
}
}
## 本题是向一个Javaswing程序提供要给窗口,则填JApplet;初始化JApplet是init方法;初始化种将奔雷的Label添加到全局种,则contentPane
import java.awt.*;
import javax.swing.*;
//*********Found**********
public class Java_3 extends JApplet
{
//*********Found**********
public void init ()
{
Container contentPane = getContentPane();
JLabel label = new JLabel("One World One Dream",SwingConstants.CENTER);
label.setFont(new Font("Arial", Font.BOLD, DEFAULT_SIZE));
//*********Found**********
contentPane.add(label);
}
private static final int DEFAULT_SIZE = 24;
}