How to Use StringTokenizer in Java?

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The string tokenizer class allows an application to break a string into tokens. A token is returned by taking a substring of the string that was used to create the StringTokenizer object. There are three ways to construct a StringTokenizer.

public class Program { 
 
    public static void main(String[] args) {

     System.out.println("Case 1.");
        StringTokenizer st = new StringTokenizer("this is a test");
        while (st.hasMoreTokens()) {
            System.out.println(st.nextToken());
        }
     
     System.out.println("Case 2.");
        st = new StringTokenizer("this,is a=test", " ,=");
        while (st.hasMoreTokens()) {
            System.out.println(st.nextToken());
        }

        System.out.println("Case 3.");
        st = new StringTokenizer("this,is a=test", " ,=", true);
        while (st.hasMoreTokens()) {
            System.out.println(st.nextToken());
        }

        System.out.println("Case 4.");
        st = new StringTokenizer("this,is a=test", " ,=", false);
        while (st.hasMoreTokens()) {
            System.out.println(st.nextToken());
        }

    }
}

The output is

Case 1.
this
is
a
test

Case 2.
this
is
a
test

Case 3.
this
,
is
 
a
=
test

Case 4.
this
is
a
test

StringTokenizer is pretty straight forward. You can separate a String by any delimiters that you choose such as a blank space, or a comma. Once you create a StringTokenizer object with a String, like above example. You can call nextToken() to get the next block of String (token).