給定一個字符串，逐個翻轉字符串中的每個單詞。
樣例
樣例 1:
輸入: "the sky is blue"
輸出: "blue is sky the"
樣例解釋:
返回逐字反轉的字符串.
樣例 2:
輸入: "hello world"
輸出: "world hello"
樣例解釋:
返回逐字反轉的字符串.
代碼區:public class Solution {
/*
*username：softstarhhy
* @param s: A string
* @return: A string
*/
public String reverseWords(String s) {
// write your code here
s=s.trim();
char[] chars=s.toCharArray();
int[] spacelocnums=new int[chars.length];
for (int i=0;i<chars.length ;i++ )
{
if(chars[i]==' ')
{
spacelocnums[i]=1;
}
}
int beforenum=0,afternum=0;
int current=0;
for(int j=0;j<chars.length;j++,current++)//當前指針指向一個非空格值
{
beforenum=j-1;
afternum=j+1;
if(j==0)
{
j=j;
chars[0]=chars[j];
}else if(spacelocnums[j]!=1)
{
chars[current]=chars[j];
}else if(spacelocnums[beforenum]!=1&&spacelocnums[j]==1&&spacelocnums[afternum]==1)
{
current--;
}else if(spacelocnums[beforenum]!=1&&spacelocnums[j]==1&&spacelocnums[afternum]!=1)
{
chars[current]=chars[j];
}
else if(spacelocnums[beforenum]==1&&spacelocnums[j]==1&&spacelocnums[afternum]!=1)
{
chars[current]=chars[j];
}else if(spacelocnums[beforenum]==1&&spacelocnums[j]==1&&spacelocnums[afternum]==1)
{
current--;
}else if(spacelocnums[beforenum]==1&&spacelocnums[j]!=1&&spacelocnums[afternum]!=1)
{
chars[current]=chars[j];
}
}
String deleteallmutiplespace=String.valueOf(chars );
String deleteallmutiplespace2=deleteallmutiplespace.substring(0,current);
if(calsinglespacenum(deleteallmutiplespace2)==0)
{
return deleteallmutiplespace2;
}
else
{
String reversestr= reversetrueString(deleteallmutiplespace2);
String finalstr="";
char[] reversestrspac=reversestr.toCharArray();
int [] intreversestrspac=calsinglespacenumways(reversestr);
int judgefirstspace=0;
for(int j=0, k=0;k<reversestrspac.length;j++,k++)
{
if(intreversestrspac[k]==1)
{
String currentstr="";
if(judgefirstspace==0)
{
currentstr=""+reversetrueString(reversestr.substring(j,k));
finalstr=finalstr+currentstr;
j=k;
judgefirstspace++;
}
else
{
currentstr=" "+reversetrueString(reversestr.substring(j,k));
finalstr=finalstr+currentstr;
j=k;
judgefirstspace++;
}
}else if(k==reversestrspac.length-1)
{
String currentstr2=" "+reversetrueString(reversestr.substring(j,k+1));
finalstr=finalstr+currentstr2;
j=k;
}
else
{
j--;
}
}
return finalstr;
}
}
String reversetrueString(String truestring)
{
int strlength=truestring.length();
char[] chars=truestring.toCharArray();
char current='\0';
for(int i=0;i<strlength/2;i++)
{
current=chars[i];
chars[i]=chars[strlength-i-1];
chars[strlength-i-1]=current;
}
String returnstr=String.valueOf(chars);
return returnstr;
}
int[] calsinglespacenumways(String str)
{
char[] charssinglespacenum=str.toCharArray();
int[] intsinglespacenum=new int[charssinglespacenum.length];
for(int i=0;i<charssinglespacenum.length;i++)
{
if(charssinglespacenum[i]==' ')
{
intsinglespacenum[i]=1;
}
else
{
intsinglespacenum[i]=0;
}
}
return intsinglespacenum;
}
int calsinglespacenum(String str)
{
char[] charssinglespacenum2=str.toCharArray();
int intsinglespacenum=0;
for(int i=0;i<charssinglespacenum2.length;i++)
{
if(charssinglespacenum2[i]==' ')
{
intsinglespacenum++;
}
else
{
intsinglespacenum=intsinglespacenum;
}
}
return intsinglespacenum;
}
}