将输入的字符串倒着输出，例如：I am a student，输出：tneduts a ma I.（用java编写 ）

public class Test{
public static void main(String[] args){
String str = "I am a student";

System.out.println("逆序前：" + str);

str = reverse(str);

System.out.println("逆序后：" + str);
}

public static String reverse(String str)
{
int i;
StringBuffer temp = new StringBuffer();

for(i=str.length()-1; i>=0; i--)
{
temp.append(str.charAt(i));
}

return temp.toString();
}
}

very Easy In Java.
public static void main(String[] args) {
// TODO Auto-generated method stub

String str1="I am a student";
String str2="";
for(int i=str1.length()-1;i>=0;i--){
str2=str2+str1.charAt(i);
}
System.out.println(str2);
}

弄成数组，倒叙输出