显示字符串的全排列

显示字符串的全排列：

public static void AllSequenceofString(String string){
        if(string == null)
            return;
        char[] chars = string.toCharArray();
        Permutation(chars,0);
    }
    private static void Permutation(char[] chars, int index) {
        // TODO Auto-generated method stub
        if(index == chars.length){
            for(int i=0;i<chars.length;i++){
                System.out.print(chars[i]);
            }
            System.out.println();
        }
        else{
            for(int i = index ; i < chars.length;i++){
                char temp = chars[i];
                chars[i] = chars[index];
                chars[index] = temp;
                Permutation(chars,index+1);
                temp = chars[index];
                chars[index] = chars[i];
                chars[i] = temp;
            }
        }
    }