java单词倒序_利用java实现单词倒序排列

本文就是会将数组里面的单词进行倒序排列 例如 how old are you -> you are old how

示例程序输出结果：

the first:

How old are you !? I don't understand

the second:

understand don't I ?! you are old How

示例代码

public static void main(String[] args) {

char[] chars= new String("How old are you !? I don't understand").toCharArray();

System.out.println("the first:");

System.out.println(chars);

reverseWords(chars); //主要方法

System.out.println("the second:");

System.out.println(chars);

}

/**

* 会将数组里面的单词 倒序排列 例如 how old are you -> you are old how

* @param chars

*/

public static void reverseWords(char[] chars) {

reverseChars(chars,0,chars.length-1);

int begin = -1;

int end = 0;

for(int i=0;i

char c = chars[i];

if((c>='a'&&c<='z')||(c>='A'&&c<='Z')||c=='\''){ //简单的判断了一下是否是连续的单词

if(begin==-1){

begin = i;

end=i;

}else{

end=i;

if(i==chars.length-1){

reverseChars(chars,begin,end);

}

}

}else{

if(begin!=-1){

reverseChars(chars,begin,end);

begin=-1;

end=0;

}

}

}

}

/**

* 将char 一定范围内的 字符 倒序排列 例如 hello -> olleh

* @param chars 数组

* @param begin 开始位置

* @param end 结束位置

*/

public static void reverseChars(char[] chars, int begin, int end) {

while(end>begin){

char c = chars[begin];

chars[begin] = chars[end];

chars[end] = c;

begin++;

end--;

}

}

以上就是利用java实现单词倒序排列，希望对大家能够理解，对大家有所帮助