【java】字符串的反转

@org.junit.Test
    public void test(){
        String a = "I IOVE CHINA";

        if(a.indexOf(" ")>0){
            String[] aArr = a.split(" ");
            for (int i = aArr.length-1; i >=0; i--) {
                System.out.print(aArr[i]+" ");
            }
        }else{
            char[] aArr = a.toCharArray();
            for (int i = aArr.length-1; i >=0; i--) {
                System.out.print(aArr[i]);
            }
        }

    }