为什么要配置classpath变量？ 配置classpath变量，才能使得java解释器知道到哪里去找标准类库，这些标准类库是别人已经写好了的，我们只管使用。比如我们常用到java.lang包中的类，在配置classpath变量后被设为默认导入，所以在写程序时就不用import这个包了。

At one time or another, developers experience frustration when dealing with the Java classpath. It’s not always clear which class the class loader will load, especially when your application’s ...

Java is one of the most in-demand programming languages in the world and one of the two official programming languages used in Android development (the other being Kotlin). Developers familiar with ...

The most significant addition to the Java language since Sun Microsystems rewrote the collections API for Java 5 is the introduction of Java records. Java records address two significant pain points ...

Java is an object-oriented programming language. To create objects and meaningfully initialize them, a developer must use a Java constructor. Constructors are a critical part of software development ...