小弟刚学,老是不可以用外部类!各位大哥给看看!头都大了
这是源程序
import java.awt.*;
public class FrameTest extends frame {
public FrameTest (string title){
super(title);
}
public static void main( string args[]){
FrameTest test=new FrameTest("sdfds");
test.setLocation(100,100);
test.setSize(200,200);
test.setVisible(true);
}
}
文件存在i:盘下,JDK在c:\j2sdk14下执行后显示
I:\a>javac Frametest.java
Frametest.java:2: cannot resolve symbol
symbol : class frame
location: class FrameTest
public class FrameTest extends frame {
^
Frametest.java:3: cannot resolve symbol
symbol : class string
location: class FrameTest
public FrameTest (string title){
^
Frametest.java:7: cannot resolve symbol
symbol : class string
location: class FrameTest
public static void main( string args[]){
^
Frametest.java:9: cannot resolve symbol
symbol : method setLocation (int,int)
location: class FrameTest
test.setLocation(100,100);
^
Frametest.java:10: cannot resolve symbol
symbol : method setSize (int,int)
location: class FrameTest
test.setSize(200,200);
^
Frametest.java:11: cannot resolve symbol
symbol : method setVisible (boolean)
location: class FrameTest
test.setVisible(true);
^
6 errors
I:\a>
执行以下文件就可以
import java.io.*;
public class hello{
public static void main(String args[]) {
System.out.println("Hello World!");
}
}
哪位给看看,小头真是找不出原因