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Convert Decimal into Binary
In this section, you will learn to convert decimal number into binary.

Convert Decimal into Binary

In this section, you will learn to convert decimal number into binary. The java.lang package provides the functionality to convert a decimal number into a binary number.

Description of program:

This program takes a decimal number from console and it converts it into binary format using the toBinaryString() method. Input number is taken as string so convert it into an integer data using the Integer.parseInt() method. To convert the Decimal number into binary number use toBinaryString() method.

toBinaryString():
This method takes an integer type value and returns its string representation of integer values which represents the data in binary. The base of binary number is 2.

Here is the code of this program:


import java.lang.*;

import java.io.*;

public class DecimalToBinary{

  public static void main(String args[]) throws IOException{

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

  System.out.println("Enter the decimal value:");

  String hex = bf.readLine();

  int i = Integer.parseInt(hex);  

  String by = Integer.toBinaryString(i);

  System.out.println("Binary: " + by);

  }

}

Download this program.

Output of this program:

C:\corejava>java DecimalToBinary
Enter the decimal value:
123
Binary: 1111011
C:\corejava>_

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Current Comments

4 comments so far (post your own) View All Comments Latest 10 Comments:

hey, how can you please do this again without the "toBinaryString" and not importing it to java lang..

Posted by jhet on Saturday, 09.27.08 @ 07:28am | #80733

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hai
By useing this how to elemenate(remove)
duplicate values in array

1------------1 Row
1 1--------------2Row
1 2 1-------------3Row
1 2 2 3------------4Row
1 2 3 3 2-----------5Row
see above in this remove duplicates and give me
out in the following way

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

Posted by durgaprasad on Friday, 09.12.08 @ 14:34pm | #78870

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hai

by useing this methode implement the programm
public void devisibleByThree(int i,int j)
{
..............
..............
............
}
by useing this implement programm in java

Posted by durgaprasad on Friday, 09.12.08 @ 14:23pm | #78869

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which JRE is it

Posted by steve on Saturday, 02.9.08 @ 20:12pm | #47710

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