题目: =====i am biter逆置为: biteram i函数原型:

 public static String reverseSentence(String str) {

public class TestDemo4 {
    public static void reverse(char[] ch, int start, int end) {//倒置数组
        char tmp;
        tmp = ch[start];
        ch[start] = ch[end];
        ch[end] = tmp;
        start++;
        end--;
    }

    public static String reverseSentence(String str) {
        char[] array1 = str.toCharArray();
        String stringArray[]=str.split(" ");
        StringBuffer Str=new StringBuffer();
        int length=stringArray.length;
        for(int i=0;i<length;i++){
            Str.append(stringArray[length-i-1]+" ");//用StringBuffer将其逆转.
        }
        return Str.toString();//转换为String.

    }

    public static void main(String[] args) {
        String str = new String();
        str = "i am biter";
        System.out.println("逆转后为：" + reverseSentence(str));

    }
}