convert hexadecimal to binary in java code example
Example 1: java convert hex to binary method
private String parseHexBinary(String hex) {
String digits = "0123456789ABCDEF";
hex = hex.toUpperCase();
String binaryString = "";
for(int i = 0; i < hex.length(); i++) {
char c = hex.charAt(i);
int d = digits.indexOf(c);
if(d == 0) binaryString += "0000";
else binaryString += Integer.toBinaryString(d);
}
return binaryString;
}
Example 2: hexadecimal to binary in java
import java.util.Scanner;
public class HexadecimalToBinaryJava
{
public static void main(String[] args)
{
int decimalNumber, a = 1, b;
int[] binaryNumber = new int[100];
Scanner sc = new Scanner(System.in);
System.out.print("Please enter hexadecimal number: ");
String hexaDecimalNumber = sc.nextLine();
decimalNumber = toDecimal(hexaDecimalNumber);
while(decimalNumber != 0)
{
binaryNumber[a++] = decimalNumber % 2;
decimalNumber = decimalNumber / 2;
}
System.out.print("The equivalent binary number is: ");
for(b = a - 1; b > 0; b--)
{
System.out.print(binaryNumber[b]);
}
System.out.print("\n");
sc.close();
}
public static int toDecimal(String str)
{
String strDigits = "0123456789ABCDEF";
str = str.toUpperCase();
int val = 0;
for(int a = 0; a < str.length(); a++)
{
char c = str.charAt(a);
int d = strDigits.indexOf(c);
val = 16 * val + d;
}
return val;
}
}