源程序显示hello world
public class wo
{
public static void main(String[] args) //本行代码String的S一定要大写
{
System.out.println("Hello World!"); //本行System的S 也一定要大写
}
}
运行成功!——————————————————————————————————————————————————
但是当我修改成
public class wo
{
public static void main(String[] args) //本行代码String的S一定要大写
{
System.out.println("Hello World!"); //本行System的S 也一定要大写
System.out.println(new Date());
}
}
——————————————————————————————————————————————————————
运行出错,运行结果如下C:\java>javac wo.java
wo.java:6: cannot resolve symbol
symbol : class Date
location: class wo
System.out.println(new Date());
^
1 error
public class wo
{
public static void main(String[] args) //本行代码String的S一定要大写
{
System.out.println("Hello World!"); //本行System的S 也一定要大写
}
}
运行成功!——————————————————————————————————————————————————
但是当我修改成
public class wo
{
public static void main(String[] args) //本行代码String的S一定要大写
{
System.out.println("Hello World!"); //本行System的S 也一定要大写
System.out.println(new Date());
}
}
——————————————————————————————————————————————————————
运行出错,运行结果如下C:\java>javac wo.java
wo.java:6: cannot resolve symbol
symbol : class Date
location: class wo
System.out.println(new Date());
^
1 error
import java.util.Date;public class wo {
public static void main(String[] args) // 本行代码String的S一定要大写
{
System.out.println("Hello World!"); // 本行System的S 也一定要大写
System.out.println(new Date());
}
}