/** * Created by xfyou on 2016/11/4. */public class SubstringDemo {    public static void main(String[] args) {        String a = "Java is great.";        System.out.println(a);        System.out.println(a.substring(5));        System.out.println(a.substring(5, 7));        // Java的整个字符串的结束索引在最后一个字符之外        System.out.println(a.substring(5, a.length()));        System.out.println(a.indexOf('.'));        System.out.println(a.length());    }}