运动字符串法

//时 代 J     a    v  a - nowjava.com 提 供

public class Main {


    public static void main(String[] arguments) {

        String str = " this is a test. this is a test. this is a test?";


        System.out.println("The string is: " + str);

        System.out.println("Length of this string: " + str.length());

        System.out.println("The character at position 6: " + str.charAt(6));

        System.out.println("The substring from 26 to 32: " + str.substring(26, 32));

        System.out.println("The index of the first 'a': " + str.indexOf('a'));

        System.out.println("The index of the beginning of the " +