使用StringBuilder类的reverse()方法来实现。

Java经典实例:按字符颠倒字符串_java
/**
 * Created by Frank
 */
public class StringRevChar {
    public static void main(String[] args) {
        String sh = "ABCDEFG";
        System.out.println(sh + "->" + new StringBuilder(sh).reverse());
    }
}
Java经典实例:按字符颠倒字符串_java