字符串翻转

public class test {
public static void main(String[] args) {
String s="abcdefga";

/* char[] b=a.toCharArray();
System.out.println(b[0]);
StringBuffer buf=new StringBuffer();
for (int j = b.length-1; j>-1 ; j--) {
buf.append(b[j]);

}
System.out.println(buf.toString());
System.out.println("aaa");*/

  StringBuffer sb=new StringBuffer();
    for(int i=s.length()-1;i>=0;i--)
    {
      sb.append(s.charAt(i));
    }
    System.out.println(sb.toString());

/* char []cc = s.toCharArray();
     char []temp = new char[cc.length];
    for(int i=0,j=c.length-1;i<c.length;i++,j--){
      temp[j]=c[i];
    }
     System.out.println(temp);
 
       char[]c=s.toCharArray();
       for(int i=0,j=c.length-1;i<c.length;i++,j--){
       temp[j]=c[i];
       }
       System.out.println(temp);*/
}

}