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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
	{
		String line="ahahahahaggg34ahahahaha";
		// your code goes here
		for (int i=0;i<line.length;i++){
					if (!line[i].equals("0")&&
                        !line[i].equals("1")&&
                        !line[i].equals("2")&&
                        !line[i].equals("3")&&
                        !line[i].equals("4")&&
                        !line[i].equals("5")&&
                        !line[i].equals("6")&&
                        !line[i].equals("7")&&
                        !line[i].equals("8")&&
                        !line[i].equals("9")){
							output+=line[i];
                    }
            	}
	}
}

Main.java:14: error: cannot find symbol
		for (int i=0;i<line.length;i++){
		                   ^
  symbol:   variable length
  location: variable line of type String
Main.java:15: error: array required, but String found
					if (!line[i].equals("0")&&
					         ^
Main.java:16: error: array required, but String found
                        !line[i].equals("1")&&
                             ^
Main.java:17: error: array required, but String found
                        !line[i].equals("2")&&
                             ^
Main.java:18: error: array required, but String found
                        !line[i].equals("3")&&
                             ^
Main.java:19: error: array required, but String found
                        !line[i].equals("4")&&
                             ^
Main.java:20: error: array required, but String found
                        !line[i].equals("5")&&
                             ^
Main.java:21: error: array required, but String found
                        !line[i].equals("6")&&
                             ^
Main.java:22: error: array required, but String found
                        !line[i].equals("7")&&
                             ^
Main.java:23: error: array required, but String found
                        !line[i].equals("8")&&
                             ^
Main.java:24: error: array required, but String found
                        !line[i].equals("9")){
                             ^
Main.java:25: error: cannot find symbol
							output+=line[i];
							^
  symbol:   variable output
  location: class Ideone
Main.java:25: error: array required, but String found
							output+=line[i];
							            ^
13 errors

Standard output is empty