Java 倒序输出

/*
 * 字符串abcdefg，要求按逆序输出为gfedcba
 */
public class ReverseSort {

	public static String reverseSort(String str) {
		String str2 = "";
		for (int i = str.length() - 1; i > -1; i--) {
			str2 += String.valueOf(str.charAt(i));
		}

		return str2;
	}

	public static void main(String[] args) {
		String str = "abcdefg";
		String sortedStr = reverseSort(str);
		System.out.println(sortedStr);
	}

}

//使用reverse()方法
public class reverseTest {
    public static void main(String[] args) {
        String originalString = "abcdefg";
        StringBuffer stringBuffer = new StringBuffer(originalString);
        System.out.println(stringBuffer.reverse());
}
}

String a = "abc";
String[] b = a.split("");
String c = "";
for (int i=b.length;i>0;i--){
c+=b[i];
}