摘要:
public class hellow { public static void main (String[] args) { System.out.println("hollow Java!"); } } System.out.println(); 输出后换行 System.out.prin 阅读全文
摘要:
网址:https://www.oracle.com/java/technologies/javase-downloads.html 配置环境变量 新建: JAVA_HOME -》 D:\java\jdk-13.0.2_windows-x64_bin\jdk-13.0.2 新建:CLASSPATH - 阅读全文