blocks|key|1338966|text|你没有。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1338967|如果您想扩展Person+with+Student，只需执行以下操作：|1338968|public+class+Student+extends+Person
{
}|code-block|syntax|javascript|1338969|并确保在编译这两个类时，其中一个可以找到另一个。|1338970|您使用的是哪种IDE？|1338971|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You don't.

If you want to extend Person with Student, just do:

<pre><code>public class Student extends Person
{
}
</code></pre>

And make sure, when you compile both classes, one can find the other one.

What IDE are you using?

blocks|key|1554658|text|只需将这两个文件放在同一个目录中即可。下面是一个例子：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1554659|Person.java|1554660|public+class+Person+{
++public+String+name;

++public+Person(String+name)+{
++++this.name+=+name;
++}

++public+String+toString()+{
++++return+name;
++}
}|code-block|syntax|javascript|1554661|Student.java|1554662|public+class+Student+extends+Person+{
++public+String+somethingnew;

++public+Student(String+name)+{
++++super(name);
++++somethingnew+=+"surprise!";
++}

++public+String+toString()+{
++++return+super.toString()+%2B+"\t"+%2B+somethingnew;
++}

++public+static+void+main(String[]+args)+{
++++Person+you+=+new+Person("foo");
++++Student+me+=+new+Student("boo");

++++System.out.println("Your+name+is+"+%2B+you);
++++System.out.println("My+name+is+"+%2B+me);
++}
}|1554663|运行Student+(因为它有main函数)会得到所需的结果：|1554664|Your+name+is+foo
My+name+is+boo++surprise!|1554665|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Just put the two files in the same directory. Here's an example:

Person.java

<pre><code>public class Person {
 public String name;

 public Person(String name) {
 this.name = name;
 }

 public String toString() {
 return name;
 }
}
</code></pre>

Student.java

<pre><code>public class Student extends Person {
 public String somethingnew;

 public Student(String name) {
 super(name);
 somethingnew = "surprise!";
 }

 public String toString() {
 return super.toString() + "\t" + somethingnew;
 }

 public static void main(String[] args) {
 Person you = new Person("foo");
 Student me = new Student("boo");

 System.out.println("Your name is " + you);
 System.out.println("My name is " + me);
 }
}
</code></pre>

Running Student (since it has the main function) yields us the desired outcome:

<pre><code>Your name is foo
My name is boo surprise!
</code></pre>

blocks|key|1554704|text|Java不像C那样使用includes。相反，java使用称为类路径的概念，即包含java类的资源列表。JVM可以通过名称访问类路径上的任何类，因此，如果您可以扩展类并只需声明它们就可以引用类型。java的include语句的结尾是'import‘。因为类被分解成像foo.bar.Baz这样的名称空间，所以如果您在qux包中，并且希望在不使用全名foo.bar.Baz的情况下使用Baz类，那么您需要在java文件的开头使用一个导入语句，如下所示：import+foo.bar.Baz|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1554705|entityMap^0|69|I|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Java doesn't use includes the way C does. Instead java uses a concept called the classpath, a list of resources containing java classes. The JVM can access any class on the classpath by name so if you can extend classes and refer to types simply by declaring them. The closes thing to an include statement java has is 'import'. Since classes are broken up into namespaces like foo.bar.Baz, if you're in the qux package and you want to use the Baz class without having to use its full name of foo.bar.Baz, then you need to use an import statement at the beginning of your java file like so:
<code>import foo.bar.Baz
</code>

How can I include one java file into another java file? 

For example:
If I have 2 java file one is called <code>Person.java</code> and one is called <code>Student.java</code>. How can I include <code>Person.java</code> into <code>Student.java</code> so that I can extend the class from <code>Person.java</code> in <code>Student.java</code>

Extend a java class from one file in another java file

Java

如何将一个java文件包含到另一个java文件中？例如:如果我有两个java文件，一个叫做Person.java，一个叫做Student.java。如何将Person.java包含到Student.java中，以便在Student.java中扩展Person.java中的类

问从另一个java文件中的一个文件扩展java类。
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