Ex8_19 코드
<![CDATA[
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
