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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[] inputs = key.split(",");
		System.out.println(inputs.toString);
	}
}

Main.java:12: error: cannot find symbol
	String[] inputs = key.split(",");
	                  ^
  symbol:   variable key
  location: class Ideone
Main.java:13: error: cannot find symbol
		System.out.println(inputs.toString);
		                         ^
  symbol:   variable toString
  location: variable inputs of type String[]
2 errors

Standard output is empty