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How to split the string in java using StringTokenizer?

Description

StringTokenizer object available in util package is used to split the String. It splits the string into tokens using spaces between them. A file is chosen using JFileChooser and is read as string readLine method of BufferedReader object. Result is displayed in JTextArea.

Sample Code
  • Filename:StringTokenizerTest .java

import java.sql.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
class StringTokenizerTest {
JPanel panel;
JFrame jf;
JLabel label1,label2;
JButton Browse,Split;
JTextField textfield1,textfield2,textfield3;
JPasswordField passwordfield;
JTextArea textArea1;
String s="";
public StringTokenizerTest() {
initComponents();
handlingEvents();
}
public void initComponents() {
jf=new javax.swing.JFrame();
jf.setTitle("StringTokenizerTest");
jf.setLayout(null);
jf.setSize(800,500);
jf.show();
jf.setVisible(true);
JScrollPane scrollBar=new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
jf.add(scrollBar);
label1=new javax.swing.JLabel("Choose File");
label1.setFont(new Font("Monotype Corsiva", Font.BOLD, 24));
label1.setBounds(50,80,200,40);
jf.add(label1);
textfield1=new javax.swing.JTextField();
textfield1.setFont(new Font("Monotype Corsiva", Font.BOLD, 18));
textfield1.setBounds(250,80,200,30);
jf.add(textfield1);
Browse=new javax.swing.JButton("Browse");
Browse.setFont(new Font("Monotype Corsiva", Font.BOLD, 24));
Browse.setBounds(480,80,140,30);
jf.add(Browse);
Split=new javax.swing.JButton("Split");
Split.setFont(new Font("Monotype Corsiva", Font.BOLD, 24));
Split.setBounds(250,350,140,30);
jf.add(Split);

textArea1=new javax.swing.JTextArea();
textArea1.setFont(new Font("Monotype Corsiva", Font.BOLD, 18));
textArea1.setLineWrap(true);
textArea1.setWrapStyleWord(true);
JScrollPane scrollBar1=new JScrollPane(textArea1,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
scrollBar1.setBounds(250,120,200,200);
jf.add(scrollBar1);
}
public void handlingEvents() {
Browse.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
JFileChooser fc = new JFileChooser();
fc.setFileSelectionMode(JFileChooser.FILES_ONLY);
if (fc.showOpenDialog(null)==JFileChooser.APPROVE_OPTION) {
String inputFile=fc.getSelectedFile().getPath();
String filename=fc.getSelectedFile().getName();
textfield1.setText(inputFile);

String st1="";
try {
FileReader f = new FileReader(inputFile);
BufferedReader br = new BufferedReader(f);
while((st1 = br.readLine()) != null) {
s = s + st1;
}
f.close();
textArea1.setText(s);
}
catch (IOException e) {
System.out.println(e);
}
}
}
});
Split.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
textArea1.setText("Splitted File Content"+"\n");
int i = 0;
StringTokenizer st = new StringTokenizer(s);
i = st.countTokens();
while (st.hasMoreTokens()) {
textArea1.append(st.nextToken()+"\n");
}
textArea1.append("Total String Tokens="+i);
}
});
}
public static void main(String args[]) {
StringTokenizerTest log = new StringTokenizerTest();
}
}


Screenshots