java 基础

反转字符串

public class Main {

    public static void main(String[] args) {


        String newStr= strReverseWithArray("abc123");
        System.out.println(newStr);

    }

    private static String strReverseWithArray(String string) {

        if(string==null || string.length()==0)
            return string;
        int length = string.length();
        char [] array=string.toCharArray();
        for(int i=0;i<length;i++){
            array[i]=string.charAt(length-1-i);
        }
        return new String(array);
    }
    }

运行结果：

321cba