字符串反转

Posted 2022-11-13 onetheway2018

public static String reverse(String str)  
        return new StringBuilder(str).reverse().toString();  
    

public void test09()   
        String str = "hello";  
  
        for (int i = str.length() - 1; i >= 0; i--)   
              
            char c = str.charAt(i);  
              
            System.out.print(c);