Question

How to get the first N words from a string in Java

Answer 1

public class MyClass {
    public static void main(String args[]) {
        String s = "java c c++ python c#";
        String [] arr = s.split("\\s+"); 

        int N = 3;
        String first3 = "";

        for (int i=0; i < N ; i++) {
             first3 += arr[i] + " ";         
        }

        System.out.println(first3);
    }
}




/*
run:

java c c++ 

*/

 

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Answer 2

public class MyClass {
    public static String firstNWords(String s, int n) {
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) == ' ') {
                n--;
            }
            if (n == 0) {
                return s.substring(0, i);
            }
        }
        return "";
    }
    public static void main(String args[]) {
        String s = "java c c++ python c#";
        int N = 3;
        
        String first3 = firstNWords(s, N);

        System.out.println(first3);
    }
}




/*
run:

java c c++

*/


/*
run:

java c c++

*/

 

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