华为oj字符串合并处理

import java.util.Arrays;
import java.util.Scanner;

public class Main {

public static void main(String[] args) {
//Integer i = 4;
//static int reverse(int i)
//System.out.println(Integer.toBinaryString(9));
//System.out.println(Integer.reverse(2));

//StringBuffer str = new StringBuffer("lirao");
//System.out.println(str.reverse());
//static String toString(char[] a)  返回指定数组内容的字符串表示形式。
//char[] toCharArray() 将此字符串转换为一个新的字符数组。
//Integer.valueOf("0101",2).toString()

Scanner sc = new Scanner(System.in);
String str1 = sc.next();
String str2 = sc.next();

String str = str1 + str2;

String oddstr = new String("");
String evenstr = new String("");

for (int i = 0; i < str.length();i++)
if ((i & 1) == 0)
evenstr += str.charAt(i);
else
oddstr += str.charAt(i);

//System.out.println(evenstr+"----"+oddstr);

char[] s1 = evenstr.toCharArray();
char[] s2 = oddstr.toCharArray();

Arrays.sort(s1);
Arrays.sort(s2);

String outstr = new String("");
int even = 0,odd = 0;
for (int i = 0; i < str.length();i++){
if ((i & 1) == 0){
outstr += s1[even];
even++;
}
else {
outstr += s2[odd];
odd++;
}
}
String reoutstr = new String("");
for (int i = 0; i < outstr.length();i++){
if (Character.isDigit(outstr.charAt(i))){
reoutstr += tranfun(outstr.charAt(i) - 48);
}
//Integer.toHexString(int i)
else if(outstr.charAt(i) >= 'a' && outstr.charAt(i) <= 'f'){
//Integer.valueOf("FFFF",16).toString()
reoutstr += Integer.toHexString(tranfun(outstr.charAt(i) - 87));
}
else if(outstr.charAt(i)>='A'&&outstr.charAt(i)<= 'F'){
reoutstr += Integer.toHexString(tranfun(outstr.charAt(i) - 55));
}
else
reoutstr += outstr.charAt(i);
}
char[] strr = reoutstr.toCharArray();

for (int i = 0; i < reoutstr.length();i++){
if (reoutstr.charAt(i)>='a' && reoutstr.charAt(i)<='f'){
strr[i] = (char)(strr[i] - 32);
}
}

for (int i = 0; i < strr.length;i++)
System.out.print(strr[i]);

}
public static int tranfun(int inter){
String str1 = Integer.toBinaryString(inter);
StringBuffer strb = new StringBuffer(str1);
strb.reverse();

String str2 = strb.toString();
//Integer.valueOf("0101",2).toString()
int out = Integer.valueOf(str2,2);

return out;

}

}