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reveserWords.java
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reveserWords.java
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package leetcode;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class reveserWords {
public static String reverseWords(String s) {
Pattern p=Pattern.compile("[a-zA-Z0-9!?+-~@#$%^&*.<>;'\"]+");
Matcher m=p.matcher(s);
ArrayList<String> list=new ArrayList<String>();
while(m.find()){
list.add(m.group(0));
}
StringBuilder sb=new StringBuilder("");
for(int i=list.size()-1;i>0;i--)
sb.append(list.get(i)+" ");
if(list.size()!=0)
sb.append(list.get(0));
return sb.toString();
}
public static void main(String[] args){
String s = " the sky is blue ";
String result = reverseWords(s);
System.out.println(result.length());
System.out.println("\""+result+"\"");
}
}/**
String[] splitS = s.split(" ");
int len = splitS.length;
String result ="";
System.out.println(len);
for(int i = 0;i<len;i++){
System.out.println("\""+splitS[i]+"\"");
if(!splitS[len-i-1].equals(" ")&!splitS[len-i-1].equals("")&i!=0)
result = result+" "+splitS[len-i-1];
if(!splitS[len-i-1].equals(" ")&i==0)
result = splitS[len-i-1];
}
return result;*/