String中方法举例

package com.liaojianya.chapter2;
/**
 * String一些方法的用法。
 * 1)声明一个名为name的String对象,内容是“My name is Networkcrazy”;
 * 2)输出字符串的长度;
 * 3)输出字符串的第一个字符;
 * 4)输出字符串的最后一个字符;
 * 5)输出字符串的第一个单词;
 *6) 输出字符串crazy的位置(从0开始编号的位置)
 * @author LIAO JIANYA
 * 2016年7月30日
 */
public class Exercise16_2
{
	public static void main(String[] args)
	{
		String name = "My name is Networkcrazy";
		char[] data = name.toCharArray();
		System.out.println("length of string is : " + data.length);
		System.out.println("the first character of string is : " + name.charAt(0));
		System.out.println("the last character of string is : " + name.charAt(data.length - 1));
		System.out.println("the first word of string is : " + name.substring(0, 2));
		String data1[] = name.split(" ");
		System.out.println("the first word of string is : " + data1[0]);
		System.out.println("the index of \" crazy \" is " + name.indexOf("crazy"));
	}

}
运行结果:
<pre name="code" class="java">length of string is : 23
the first character of string is : M
the last character of string is : y
the first word of string is : My
the first word of string is : My
the index of " crazy " is 18

 

posted @ 2016-07-30 09:41  Andya_net  阅读(6)  评论(0编辑  收藏  举报  来源