I have a text file that I'm reading from and I'm trying to use the words in the text as file as keys in a hashmap. I then want to print the hashmap to see it's contents. This is a prelude to a larger project. I know I could simply print out the text file, but I'm trying to experiment with the hashmap data structure. Here's the code I have so far:
import java.io.*; //needed for File class below
import java.util.*; //needed for Scanner class below
public class readIn {
public static void readInWords(String fileName){
try{
//open up the file
Scanner input = new Scanner(new File(fileName));
HashMap hm = new HashMap();
while(input.hasNext()){
//read in 1 word at a time and increment our count
String x = input.next();
System.out.println(x);
hm.put(x);
}
System.out.println(hm);
}catch(Exception e){
System.out.println("Something went really wrong...");
}
}
public static void main(String args[]){
int x = 10; //can read in from user or simply set here
String fileName = "test.txt";
readInWords(fileName);
}
}
When I run, I get a "no suitable method found for put(string)" error. My larger goal is to create this hash map and store a list of places where a certain keys appears as a value. However right now I'm just trying to learn more about hashmaps through practice and wanted to see if anyone knows why this doesn't work.