Data Conversion

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Conversion

-----------------

        All inputs in java are stored in String format. Therefore, we can convert one

        Type into another using parses method.

To Convert String to int, float, double, byte

        Integer.parseInt

        Float.parseFloat

        Double.parseDouble

        Byte.parseByte

import java.io.*;

class intro

{

   int p=10;//instance variable

   static int q=20;//class var

public static void main(String arg[])throws IOException

{

intro i=new intro();

System.out.println("instance p = " +i.p +"class q= " +q);

int a;

float b;

String s;

DataInputStream d=new DataInputStream(System.in);

System.out.println("enter the int,float,string val");

a=Integer.parseInt(d.readLine());

b=Float.parseFloat(d.readLine());

s=d.readLine();

System.out.println(" int val  : "+a);

System.out.println(" float val: "+b);

System.out.println(" String   : "+s);

}

}

//command line arguments

import java.io.*;

class cline

{

public static void main(String ar[])throws IOException

{

int no;       

String name;

float sal;

//DataInputStream d=new DataInputStream(System.in);

no=Integer.parseInt(ar[0]);

name=ar[1];

sal=Float.parseFloat(ar[2]);

System.out.println(+no);

System.out.println(name);

System.out.println(+sal);

}

}

compile:

javac cline.java

run:

java cline 33 anu 54.66

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