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