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public class Hello{
public static void main(String[] args){ //(1)
System.out.println("Hello,world!"); //(2)
}
}
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javac Hello.java
java Hello
Hello,world!
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class Simple{
static void go(){
System.out.println("Go...");
}
}
public class Cal{
public static void main(String[] args){
Simple.go();
}
}
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import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.RandomAccessFile;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
//¶ÏµãÐø´ ......

JavaÖÐÄÚ²¿ÀàµÄµ÷ÓÃ

class EnclosingOne {
public class InsideOne {
}
}
public class B {

public static void main(String[] args) {
EnclosingOne eo = new EnclosingOne();
EnclosingOne.InsideOne ei = eo.new InsideOne();
}

} ......
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