编辑代码

public class ReverseText {
	public static void main(String[] args) {
		ReverseText t1=new ReverseText();
		System.out.println(t1.reverse("HelloWorld!"));
	}
	
	public String reverse(String str){
		StringBuffer result=new StringBuffer();
		for(int k=str.length()-1;k>=0;k--){
			result.append(str.charAt(k));
		}
		return result.toString();
	}
}