二进制跟十进制进行转换

package com.lizhihui.cn;

/**
 * 十进制数据和二进制进行转换
 * @author 李智慧
 * @date Mar 24, 2012
 * @company 广东南航易网通电子商务有限公司
 */
public class TransLate {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String rString = "1101011101";
		int n = getSJZ(rString);
		System.out.println(rString+"得到的十进制数值是："+n);
		String result = getEJZ(n);
		System.out.println(n+"得到的二进制数值是："+result);
	}
	
	/**
	 * 从二进制获取十进制值
	 * @param string
	 * @return
	 */
	private static int getSJZ(String string){
		int z = 0;
		char[] c = string.toCharArray();
		for(int j = 0;j < c.length; j ++){
			int q = Integer.parseInt(c[j]+"");
			z += q*getCF(c.length-1-j);
		}
		return z;
	}
	
	/**
	 * 从十进制获取二进制数值
	 * @param z
	 * @return
	 */
	private static String getEJZ(int z){
		String result = "";
		int num;
		int ys;
		int len;
		if(z < 2){
			result = z +"";
		}else {
			while(true){
				ys = z % 2;
				len = z;
				z = z / 2;
				if(z == 1){
					if(len == 3){
						result = 11 + result;
					}else if(len == 2){
						result = 10 + result;
					}
					break;
				}else {
					result = ys + result;
				}
			}
		}
		return result;
	}
	
	/**
	 * 2的n次方值
	 * @return
	 */
	public static int getCF(int n){
		int result = 0;
		if(n == 0){
			result = 1;
		}else {
			result = getCF(n-1)*2;
		}
		return result;
	}
}