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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		class StaticDemo {
        static int a = 42;
        static int b = 99;
 
        static void callme() {
        	System.out.println("a = " + a);
	}
}
}
}

Main.java:13: error: Illegal static declaration in inner class StaticDemo
        static int a = 42;
                   ^
  modifier 'static' is only allowed in constant variable declarations
Main.java:14: error: Illegal static declaration in inner class StaticDemo
        static int b = 99;
                   ^
  modifier 'static' is only allowed in constant variable declarations
Main.java:16: error: Illegal static declaration in inner class StaticDemo
        static void callme() {
                    ^
  modifier 'static' is only allowed in constant variable declarations
3 errors

Standard output is empty