Ex8_19 코드

package org.javaro.lecture; public class Ex8_19 { public static void main(String[] args) { System.out.println("조병수-20191107-상속"); Wallet w= new Wallet(); w.save(100); Wallet.spend(10); w.save(50); Wallet.spend(200); System.out.println(Wallet.getAmount()); } } class Wallet{ static int amount=0; public void save(int amount) { Wallet.amount += amount; } public static void spend(int amount) { Wallet.amount -= amount; } public static int getAmount() { return Wallet.amount; } }

실행창

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