상자 정보 (상속 super)
public class Box {
private int x;
private int y;
private int z;
private boolean empty;
public String toString() {
String rslt = "가로: " + x + "cm 세로: " + y + "cm 높이: " + z + "cm";
/*if (empty)
return rslt + "지금 박스는 비어있습니다.\n";
else
return rslt + "지금 박스에는 물건이 들어있습니다.\n";*/
return rslt;
}
public void fillBox() {
this.empty = false;
}
public void emptyBox() {
this.empty = true;
}
public int getVolume() {
return x * y * z;
}
public double getWeight() {
return 1.1 * getVolume();
}
public Box(int x, int y, int z) {
this.x = x;
this.y = y;
this.z = z;
emptyBox();
}
}
public class MaterialBox extends Box{
private String attribute;
public void setAttribute(String attribute) {this.attribute = attribute;};
public String getAttribute() {return attribute;};
public MaterialBox(int x, int y, int z, String attribute) {
super(x, y, z);
this.attribute = attribute;
}
public void printInfo() {
System.out.println(toString());
System.out.println("재질: " + getAttribute());
System.out.println("부피: " + getVolume());
System.out.println("무게: " + getWeight() + "\n");
}
}
public class Practice_70 {
public static void main(String[] args) {
MaterialBox box1 = new MaterialBox(2, 3, 4, "wood");
MaterialBox box2 = new MaterialBox(10, 5, 5, "paper");
System.out.println("box1의 정보입니다.");
box1.printInfo();
System.out.println("box2의 정보입니다.");
box2.printInfo();
}
}
결과:
