Class/InnerClass-优快云博客

本文通过一个具体的Java示例介绍了如何在一个文件中定义多个类，并展示了这些类的调用方式及其运行结果。

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昨天工作中提到了多个class写在一个文件的方式，写了个例子，记录一下这种情况下各类的调用方式。

package test;

public class MultiClassesTest {

public static class InnerClass {

  @Override
  public String toString() {
   return super.toString() + " and my own toString result is \"xixi\"";
  }

}

public class InnerClass2 {

  @Override
  public String toString() {
   return super.toString() + " and my own toString result is \"qiqi\"";
  }

}

public static void main(String[] args) {
  TheOtherClass to = new TheOtherClass();
  System.out.println(to.toString());
  MultiClassesTest mt = new MultiClassesTest();
  System.out.println(mt.toString());
  InnerClass ic = new InnerClass();
  System.out.println(ic.toString());
  InnerClass2 ic2 = new MultiClassesTest().new InnerClass2();
  System.out.println(ic2.toString());
}

@Override
public String toString() {
return super.toString() + " and my own toString result is \"hehe\"";
}

}

class TheOtherClass {

public static void main(String[] args) {
  MultiClassesTest mt = new MultiClassesTest();
  System.out.println(mt.toString());
  TheOtherClass to = new TheOtherClass();
  System.out.println(to.toString());
  MultiClassesTest.InnerClass ic = new MultiClassesTest.InnerClass();
  System.out.println(ic.toString());
  MultiClassesTest.InnerClass2 ic2 = new MultiClassesTest().new InnerClass2();
  System.out.println(ic2.toString());
}

@Override
public String toString() {
return super.toString() + " and my own toString result is \"haha\"";
}

}

编译及运行结果：

E:\TestProject>javac test/MultiClassesTest.java

E:\TestProject>java test.MultiClassesTest
test.TheOtherClass@61de33 and my own toString result is "haha"
test.MultiClassesTest@14318bb and my own toString result is "hehe"
test.MultiClassesTest$InnerClass@ca0b6 and my own toString result is "xixi"
test.MultiClassesTest$InnerClass2@10b30a7 and my own toString result is "qiqi"

E:\TestProject>java test.TheOtherClass
test.MultiClassesTest@61de33 and my own toString result is "hehe"
test.TheOtherClass@14318bb and my own toString result is "haha"
test.MultiClassesTest$InnerClass@ca0b6 and my own toString result is "xixi"
test.MultiClassesTest$InnerClass2@10b30a7 and my own toString result is "qiqi"