都跟我说要导包，刚接触电脑，请问一次怎么导包，而而且图里面这两个包我不知道在哪里怎么找啊 ...

3、 输入d:并按回车键进入D盘，因Java文件存放于此。 4、 进入D盘 5、 进入D盘的123文件夹，因Java文件存放于此目录。 6、 输入 javac 加上 Java 文件名（含后缀）后按回车执行。 7、 输入java后跟文件名（可省略后缀），然后按回车键执行。

In the world of IDE-based development, programmers can easily become detached from JDK and the underlying technology that makes their applications work. Here is a list of the five most useful Java ...

For Java-based programs such as Maven, Jenkins, Gradle or Tomcat to run, they need to know that Java's JDK is installed. That's the purpose of the JAVA_HOME environment variable. It tells programs ...