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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
	{
		Map<string,int>map = new HashMap<string,int>();
		map.put("A",1);
		system.out.println("size:"+map.size());
	}
}

Main.java:12: error: cannot find symbol
		Map<string,int>map = new HashMap<string,int>();
		    ^
  symbol:   class string
  location: class Ideone
Main.java:12: error: unexpected type
		Map<string,int>map = new HashMap<string,int>();
		           ^
  required: reference
  found:    int
Main.java:12: error: cannot find symbol
		Map<string,int>map = new HashMap<string,int>();
		                                 ^
  symbol:   class string
  location: class Ideone
Main.java:12: error: unexpected type
		Map<string,int>map = new HashMap<string,int>();
		                                        ^
  required: reference
  found:    int
Main.java:14: error: package system does not exist
		system.out.println("size:"+map.size());
		      ^
5 errors

Standard output is empty