Java2.12.1实验1（联合编译）



MainClass

public class MainClass {    public void printcom(){        System.out.println("Hello, just need to compile. ");         //测试PrintA        PrintA a=new PrintA();        a.printa();        //测试printB        PrintB b=new PrintB();        b.printb();        //测试PrintC        PrintC c=new PrintC();        c.printc();    }    }

PrintA

public class PrintA {    public void printa(){        System.out.println("I am A");    }    }

PrintB

public class PrintB {    public void printb(){        System.out.println("I am B");    }    }

PrintC

public class PrintC {    public void printc(){        System.out.println("I am C");    }    }

Test