In Java, you can use StringTokennizer class to split a String into different tokens by defined delimiter(space is the default delimiter).
Here are some example for StringTokenizer :

Example 1:
Uses StringTokennizer to split a string by "space" and "comma" delimiter, and iterate the StringTokenizer elements and print it out one by one.

package com.jtechies;
import java.util.StringTokenizer;
public class Demo 
{
	public static void main(String[] args) 
	{
		String str = "This is Example , to split by StringTokenizer";
		StringTokenizer stringt = new StringTokenizer(str);
		System.out.println("---- Split by space ------");
		while (stringt.hasMoreElements()) 
		{
			System.out.println(stringt.nextElement());
		}
		System.out.println("---- Split by comma ',' ------");
		StringTokenizer stringt2 = new StringTokenizer(str, ",");
 
		while (stringt2.hasMoreElements()) 
		{
			System.out.println(stringt2.nextElement());
		}
	}
}			

Output :
	---- Split by space ------
This
is
Example
,
to
split
by
StringTokenizer,

 
	---- Split by comma ',' ------
This is Example 
to split by StringTokenizer

Example 2:
Read a csv file and use StringTokenizer to split the string by "|" delimiter, and print it out.

1| 5.25|  TKHTS
2| 9.123| jtechies 

package com.jtechies;
 
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.StringTokenizer;
 
public class Demo
{ 
	public static void main(String[] args) 
	{
 		BufferedReader br = null;
 		try 
 		{
 			String str;
 			br = new BufferedReader(new FileReader("c:/demo.csv"));
 			while ((str = br.readLine()) != null) 
 			{
 				System.out.println(str);
 		    	StringTokenizer stringTokenizer = new StringTokenizer
 		    		(str, "|");
 		    	while (stringTokenizer.hasMoreElements()) {
					Integer value = Integer.parseInt
						(stringTokenizer.nextElement().toString());
					Double doublevalue = Double.parseDouble
						(stringTokenizer.nextElement().toString());
					String username = 
						stringTokenizer.nextElement().toString();
						StringBuilder sb = new StringBuilder();
					sb.append("\nvalue : " + value);
					sb.append("\ndoublevalue : " + doublevalue);
					sb.append("\nUsername : " + username);
					sb.append("\n*******************\n");
					System.out.println(sb.toString());
				}
			}
			System.out.println("Completed");
		}catch (IOException e) {
			e.printStackTrace();
		}finally
		{
			try 
			{
				if (br != null)
					br.close();
			}catch (IOException ex) 
			 {
					ex.printStackTrace();
			 }
		  }
	 
	}
}			

Output :
1| 5.25|  TKHTS
 
value : 1
doublevalue : 5.25
Username :  TKHTS
*******************
 
2| 9.123| jtechies
 
value : 2
doublevalue : 9.123
Username :  jtechies
*******************