String Tokenizer

String Tokenizer:

Java.util.Tokenizer Class provides the facility to extract token form a token string. Token is sequence of character that is separated by a delimiter by a other tokens. While space as default delimiter.

public StringTokenizer(String str, String delim)

public StringTokenizer(String str)

public boolean hasMoreToken()

public String nextToken()

String str=”It is a tokend string.”;

StringTokenizer st=new StringTokenizer(str);

While(st.hasMoreTokens()){

System.out.println(st.nextToken());

}

Real Example of StringTokenizer:

public class Emp implements Serializable{

    String name;

    int marks;

    String address;

    public Emp(){

    }

    public Emp(String name,int marks, String address)

    {

        this.name=name;

        this.marks=marks;

        this.address=address;

    }

 

    @Override

    public String toString() {

        return name+"\t"+marks+"\t"+address;

    }

    public void display(){

        System.out.println("Name "+name);

         System.out.println("Marks "+marks);

          System.out.println("Address "+address);

    }

}

public class RecordSaver {

public static void main(String as[])throws Exception{

    BufferedReader b=new BufferedReader(new InputStreamReader(System.in));

    PrintWriter out=new PrintWriter(new FileOutputStream("d:/Emp.txt"));

    Emp e;

    while(true){

        System.out.println("Enter Name:");

        String name=b.readLine();

        System.out.println("Enter Marks:");

        int marks=Integer.parseInt(b.readLine());

        System.out.println("Enter Address:");

        String address=b.readLine();

        e=new Emp(name,marks,address);

        out.println(e.toString());

        System.out.println("Want to continue...(yes/no)");

        String ans=b.readLine();

        if(ans.equalsIgnoreCase("no"))

        break;

    }

    out.close();

    out.flush();

}

public class RecordReader {

    public static void main(String as[])throws Exception{

        BufferedReader b=new BufferedReader(new FileReader("d:/Emp.txt"));

        System.out.println("Following records are read from file::");

        Emp e;

        while(true){

            String rec=b.readLine();

            if(rec==null)

                break;

            StringTokenizer st=new StringTokenizer(rec,"\t");

            String name=st.nextToken();

            int marks=Integer.parseInt(st.nextToken());

            String address=st.nextToken();

            e=new Emp(name,marks,address);

            e.display();

        }

    }

}