验证——生成汉字

public void test2(){
		
		//处理
		Random random = new Random();
		String ctemp ="";
		String[] rBase={"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
		//生成第1位的区码
		int r1 = random .nextInt(3)+11; // 11~14
		String str_r1=rBase[r1];
		//生成第2位区码
		int r2;
		if(r1==13){
			r2 = random.nextInt(7); //0~7
		}else {
			r2 = random.nextInt(16);
		}
		String str_r2 = rBase[r2];
		//生成第1位位码
		int r3 = random.nextInt(6) + 10; //10~16
		String str_r3 = rBase[r3];
		//第4位位码
		int r4;
		if(r3==10){
			r4 = random.nextInt(15) +1; 
		}else  if(r3==15){
			r4 = random.nextInt(15);
			
		}else {
			r4 = random.nextInt(16);
		}
		
		String str_r4 = rBase[r4];
		
		
		
		//生成汉字
		byte[] bytes = new byte[2];
		String str_r12 = str_r1 + str_r2;
		int tempLow = Integer.parseInt(str_r12,16); //16进制转换
		bytes[0] = (byte)tempLow;
		String str_r34 = str_r3 + str_r4;
		int tempHigh = Integer.parseInt(str_r34,16);
		bytes[1] = (byte)tempHigh;
		ctemp = new String(bytes);
		System.out.print(ctemp);
		
		
		
	}