java初学者,请各位多多帮忙!

[youngpand]

我写了如下一个类:
class Number
{
int i;
}

public class Assignment
{
public static void main(String[] args) {
Number n1 = new Number();
Number n2 = new Number();
n1.i = 9;
n2.i = 47;
System.out.println("1: n1.i: " + n1.i + ",n2.i: " + n2.i);
n1 = n2;
System.out.println("2: n1.i: " + n1.i + ",n2.i: " + n2.i);
n1.i = 27;
System.out.println("3: n1.i: " + n1.i + ",n2.i: " + n2.i);
}
}

编译时无错,但在运行时,提示如下错误:
E:\javaExercise>java Assignment.java
Exception in thread "main" java.lang.NoClassDefFoundError: Assignment/java
请各位,帮忙!指出错误原因.谢了!

[zcjl]

java命令的参数是类名，不用加.java

[yshen]

你把
class Number
{
int i;
}
放到Assignment类后面试试。

[网络咖啡]

java Assignment

这样就可以了，呵呵

[cctvnet]

E:\javaExercise>java Assignment.java
改为E:\javaExercise>java Assignment.class看看（.class可以不写）

[shuki]

你首先编译一下。
javac Number.java
然后执行
java Number
当然在这之前，
必须设置好环境变量

[gaose]

>javac Assignment.java

>java Assignment