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Update BinaryToHexadecimal.java

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Libin Yang 2019-01-30 17:05:40 +08:00 committed by GitHub
parent 6312a1ee87
commit d082862fb4
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1 changed files with 31 additions and 23 deletions
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src/main/java/com/conversions/BinaryToHexadecimal.java
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@ -2,43 +2,51 @@ package src.main.java.com.conversions;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;
public class BinaryToHexadecimal {
/**
* hm to store hexadecimal codes for binary numbers
* within the range: 0000 to 1111 i.e. for decimal numbers 0 to 15
*/
private static Map<Integer, String> hmHexadecimal = new HashMap<>(16);
static {
int i;
for (i = 0; i < 10; i++)
hmHexadecimal.put(i, String.valueOf(i));
for (i = 10; i < 16; i++)
hmHexadecimal.put(i, String.valueOf((char) ('A' + i - 10)));
}
/**
* This method converts a binary number to
* a hexadecimal number.
*
* @param binary The binary number
* @param binStr The binary number
* @return The hexadecimal number
*/
public String binToHex(BigInteger binary) {
//hm to store hexadecimal codes for binary numbers within the range: 0000 to 1111 i.e. for decimal numbers 0 to 15
HashMap<Integer,String> hmHexadecimal = new HashMap<>();
public String binToHex(String binStr) {
BigInteger binary = new BigInteger(binStr);
// String to store hexadecimal code
String hex = "";
//String to store hexadecimal code
String hex="";
int i;
for(i=0 ; i<10 ; i++)
hmHexadecimal.put(i, String.valueOf(i));
for(i=10 ; i<16 ; i++)
hmHexadecimal.put(i,String.valueOf((char)('A'+i-10)));
int currentbit;
int currentBit;
BigInteger tenValue = new BigInteger("10");
while(binary.compareTo(BigInteger.ZERO) != 0) {
int code4 = 0; //to store decimal equivalent of number formed by 4 decimal digits
for(i=0 ; i<4 ; i++)
{
currentbit = binary.mod(tenValue).intValueExact();
while (binary.compareTo(BigInteger.ZERO) != 0) {
// to store decimal equivalent of number formed by 4 decimal digits
int code4 = 0;
for (int i = 0; i < 4; i++) {
currentBit = binary.mod(tenValue).intValueExact();
binary = binary.divide(tenValue);
code4 += currentbit*Math.pow(2, i);
code4 += currentBit * Math.pow(2, i);
}
hex= hmHexadecimal.get(code4) + hex;
hex = hmHexadecimal.get(code4) + hex;
}
return hex;
}
}