Util.java

package com.coding.mini_jvm.src.com.coderising.jvm.util;

public class Util {


	public static int byteToInt(byte[] codes){
    	String s1 = byteToHexString(codes);
    	return Integer.valueOf(s1, 16).intValue();
    }
    
    public static int bytes2Int(byte[] b, int start, int len) {
		int sum = 0;
		int end = start + len;
		for (int i = start; i < end; i++) {
			int n = ((int) b[i]) & 0xff;
			n <<= (--len) * 8;
			sum = n + sum;
		}
		return sum;
	}


	public static String byte2String(byte[] b, int start, int len) {
		return new String(b, start, len);
	}

	public static String byteToHexString(byte[] codes ){
		StringBuffer buffer = new StringBuffer();
		for(int i=0;i<codes.length;i++){
			byte b = codes[i];
			int value = b & 0xFF;
			String strHex = Integer.toHexString(value);
			if(strHex.length()< 2){
				strHex = "0" + strHex;
			}		
			buffer.append(strHex);
		}
		return buffer.toString();
	}
}