charAt()方法获取指定位置的字符

package com;

public class GetCharAt {

	public static void main(String[] args) {
		String str ="明月几时有，把酒问青天";
		System.out.println(str);
		char c =str.charAt(2);
		System.out.println("字符串中索引为2的字符是:"+c);

	}

}

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package com;

public class GetCharAt {

	public static void main(String[] args) {
		String str ="明月几时有，把酒问青天";
		System.out.println(str);
		char c =str.charAt(7);
		System.out.println("字符串中索引为7的字符是:"+c);
		char c2 =str.charAt(0);
		System.out.println("字符串中索引为0的字符是:"+c2);
		char c3 =str.charAt(str.length()-1);
		System.out.println("字符串中最后一个字符是:"+c3);

	}

}