/*

 * substring():

String str;

str＝str.substring(int beginIndex);截取掉str从首字母开始长度为beginIndex的字符串，将剩余字符串赋值给str；

str＝str.substring(int beginIndex，int endIndex);截取str中从beginIndex开始至endIndex结束时(不包括索引为endIndex的字母)的字符串，并将其赋值给str，截取后的字符串长度为：endIndex-beginIndex;

 如果截取的范围超出字符串的范围，会抛出异常：

 Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 15

at java.lang.String.substring(String.java:1934)

at DemoSubStr.main(DemoSubStr.java:15)

 *

 */

public class DemoSubStr {

public static void main(String[] args) {

String str1 = "0123456789";

String str2 = str1.substring(5);

String str3 = str1.substring(0, 5);

String str4 = str1.substring(5, 10);

// String str5 = str1.substring(5,15);  //越界,会抛出异常

//print

System.out.println("str1=" + str1);

System.out.println("str2=str1(5)" + str2);

System.out.println("str3=str1(0,5)" + str3);

System.out.println("str4=str(5,10)" + str4);

// System.out.println("str5=str(5，15)" + str5); //越界,会抛出异常

}

}