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我是来帮忙的。
我改过自新了，不灌水的。
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都是些无聊的人，没一个能帮我的！
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如果你是MM,我马上就帮你写好
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楼主妹妹或者是兄弟，这个很简单的，你应该自己锻炼写一下，我觉得如果你花到这里问的时间自己已经写完了。。
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lz,其实你只要写点,然后放在上面,应该有人会把你的写完.
如果是妹妹,那千里不是更乐意帮忙.几十秒钟可能就能搞定~~~~
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不是说不帮忙做作业吗？冰封偶像你可别犯错误啊~~~
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我猜楼主的图像是假的啊.大家不要被她的靓女图蒙蔽拉..
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再跟就锁帖
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回复：（merciless）刚学的JAVA老师就出这样的题目有奖...
Twice.javaimport java.io.*;
public class Twice
{
public static void main(String []args)
{
new Twice();
}
public Twice()
{
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
Boolean err = false;
double input = 0;
do{
System.out.println("请输入一个有效的数字");
err = false;
try
{
input = Double.parseDouble(in.readLine());
}catch(Exception e)
{
System.out.println("数字格式不正确");
err = true;
}
}while(err);
System.out.println("" + (input * 2));
}
}
无标题：public class Twice
{
public static void main(String []args)
{
new Twice();
}
public Twice()
{
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
Boolean err = false;
double input = 0;
do{
System.out.println("请输入一个有效的数字");
err = false;
try
{
input = Double.parseDouble(in.readLine());
}catch(Exception e)
{
System.out.println("数字格式不正确");
err = true;
}
}while(err);
System.out.println("" + (input * 2));
}
}
public class Person implements Runner
{
public String name;
public int high;
private String loverName;
public String getLoverName()
{
return loverName;
}
public void setLoverName(String name)
{
loverName = name;
}
public void Run()
{
System.out.println("Person is running.");
}
}
public class Student implements Runner
{
public String classNumber;
public void FightForFreedom()
{
setLoverName("Freedom");
System.out.println("Fight For " + getLoverName());
}
public void Run()
{
System.out.println("Student is running.");
}
}
public interface Runner
{
public void Run();
}
没测试
{
public String name;
public int high;
private String loverName;
public String getLoverName()
{
return loverName;
}
public void setLoverName(String name)
{
loverName = name;
}
public void Run()
{
System.out.println("Person is running.");
}
}
public class Student implements Runner
{
public String classNumber;
public void FightForFreedom()
{
setLoverName("Freedom");
System.out.println("Fight For " + getLoverName());
}
public void Run()
{
System.out.println("Student is running.");
}
}
public interface Runner
{
public void Run();
}
[此贴子已经被作者于2007-6-25 22:27:47编辑过]
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