先split" "字符串,变成三个字符串数组,public static String converse(String s){byte[] ss=s.getBytes();System.out.println(ss.length);byte t = 0;int bb=ss.length/2-1;for(int i=0;i{ss[i]=t;t=ss[bb-i];ss[bb-i]=ss[i];}return s;}再用上面的函数反转输出就行了