package generic_000_none;
public class BoxExample {
public static void main(String[] args) {
Box box = new Box();
box.set("홍길동");
String name = (String) box.get();
box.set(new Apple());
Apple apple = (Apple) box.get();
apple.setNum(100);
System.out.println(apple.getNum());
}
}
package generic_000_none;
public class Apple {
int num;
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
}
package generic_000_none;
public class Box {
private Object object;
public Object get() {
return object;
}
public void set(Object object) {
this.object = object;
}
}
100
generic_001_yes
package generic_001_yes;
public class BoxExample {
public static void main(String[] args) {
Box<String> box1 = new Box<String>();
box1.set("hello");
System.out.println(box1.get());
Box<Integer> box2 = new Box<Integer>(); //Integer int Wrapper Class
box2.set(6);
System.out.println(box2.get());
}
}
package generic_001_yes;
public class Box<T>{
private T t;
public T get() {
return t;
}
public void set (T t) {
this.t=t;
}
}
hello
6
generic_002_yes
package generic_002_yes;
public class ProductExample {
public static void main(String[] args) {
Product<Tv, String> product1 = new Product<Tv, String> ();
product1.setKind(new Tv("런닝맨", 6, 15, 50));
product1.setModel("Tv자료형");
Tv tv = product1.getKind();
System.out.println(product1.getModel());
System.out.println(tv.toString());
System.out.println(tv);
//주소값만 출력해도 Override된 toString이 자동실행됨.
Product<Car, String> product2 = new Product<Car, String> ();
product2.setKind(new Car());
product2.setModel("Car자료형");
Car car = product2.getKind();
System.out.println(product2.getModel());
System.out.println(car);
}
}
package generic_002_yes;
public class Car {
String carName;
String carProduct;
int carYear;
int maxLoad;
public Car() { }
public Car(String carName, String carProduct, int carYear, int maxLoad) {
super();
this.carName = carName;
this.carProduct = carProduct;
this.carYear = carYear;
this.maxLoad = maxLoad;
}
public String getCarName() {
return carName;
}
public void setCarName(String carName) {
this.carName = carName;
}
public String getCarProduct() {
return carProduct;
}
public void setCarProduct(String carProduct) {
this.carProduct = carProduct;
}
public int getCarYear() {
return carYear;
}
public void setCarYear(int carYear) {
this.carYear = carYear;
}
public int getMaxLoad() {
return maxLoad;
}
public void setMaxLoad(int maxLoad) {
this.maxLoad = maxLoad;
}
@Override
public String toString() {
return "Car [carName=" + carName + ", carProduct=" + carProduct + ", carYear="
+ carYear + ", maxLoad="+ maxLoad + "]";
}
}
package generic_002_yes;
public class Product <T, M>{
private T kind;
private M model;
public T getKind() {
return kind;
}
public void setKind(T kind) {
this.kind = kind;
}
public M getModel() {
return model;
}
public void setModel(M model) {
this.model = model;
}
}
package generic_002_yes;
public class Tv {
String programName;
int channel;
int volumn;
int light;
public Tv() {}
public Tv(String programName, int channel, int volumn, int light) {
this.programName = programName;
this.channel = channel;
this.volumn = volumn;
this.light = light;
}
public String getProgramName() {
return programName;
}
public void setProgramName(String programName) {
this.programName = programName;
}
public int getChannel() {
return channel;
}
public void setChannel(int channel) {
this.channel = channel;
}
public int getVolumn() {
return volumn;
}
public void setVolumn(int volumn) {
this.volumn = volumn;
}
public int getLight() {
return light;
}
public void setLight(int light) {
this.light = light;
}
@Override
public String toString() {
return "Tv [programName=" + programName + ", channel=" + channel + ", volumn="
+ volumn + ", light=" + light + "]";
}
}
Tv자료형
Tv [programName=런닝맨, channel=6, volumn=15, light=50]
Tv [programName=런닝맨, channel=6, volumn=15, light=50]
Car자료형
Car [carName=null, carProduct=null, carYear=0, maxLoad=0]
