java中子类的继承性
发布时间：2020-12-14 06:27:20 所属栏目：Java 来源：网络整理
导读：com.b510; Parent { numbera = 10; numberb = 20; sum() { numberb = numbera + numberb; System.out.println(numberb); } getNumbera() { System.out.println(numbera); numbera; } print() { System.out.println("numberb+numbera=" + (numberb + numbera)
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com.b510; Parent { numbera = 10; numberb = 20; sum() { numberb = numbera + numberb; System.out.println(numberb); } getNumbera() { System.out.println(numbera); numbera; } print() { System.out.println("numberb+numbera=" + (numberb + numbera)); } say() { System.out.println("Hello,i'm parent class!"); } }
com.b510; ParentAndSubClass { main(String[] args) { SubClass sub = SubClass(); sub.say(); sub.sum(); sub.print(); sub.proFun(); sub.youYuan(); } }
com.b510; SubClass Parent { youYuan() { System.out.println("子类不能继承numbera，但能继承numberb=" + numberb); System.out.println("这是子类中的友元方法"); } priFun() { System.out.println("这是private方法"); } proFun() { System.out.println("子类中可以继承numberb=" + numberb); } }
Hello,i'm parent class! 30 numberb+numbera=40 子类中可以继承numberb=30 子类不能继承numbera，但能继承numberb=30 这是子类中的友元方法
com; Parent { numbera = 10; numberb = 20; sum() { numberb = numbera + numberb; System.out.println(numberb); } getNumbera() { System.out.println(numbera); numbera; } print() { System.out.println("numberb+numbera=" + (numberb + numbera)); } say() { System.out.println("Hello,i'm parent class!"); } }
com.b510; ParentAndSubClass { main(String[] args) { SubClass sub = SubClass(); sub.say(); sub.print(); sub.proFun(); sub.youYuan(); } }
com.b510; com.Parent; SubClass Parent { youYuan() { System.out.println("子类不能继承numbera，但能继承numberb=" + numberb); System.out.println("这是子类中的友元方法"); } priFun() { System.out.println("这是private方法"); } proFun() { System.out.println("子类中可以继承numberb=" + numberb); } @Override say() { System.out.println("这是重写父类的protected方法，say(),还可以得到numberb=" + numberb); } }
这是重写父类的protected方法，say(),还可以得到numberb=20 numberb+numbera=30 子类中可以继承numberb=20 子类不能继承numbera，但能继承numberb=20 这是子类中的友元方法
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