class="area">
电脑知识吧分享：”java中String 的应用“public class HelloWorld {    public static void main(String[] args) {        //定义字符串 String hobby ="爱电脑知识吧";           String url = new String(".");                             //输出字符串 System.out.println("hobby:" +hobby           ); System.out.println("url:" +url            ); }}