java構(gòu)造函數(shù)實(shí)現(xiàn)代碼示例
TestCar.java
復(fù)制代碼 代碼如下:
public class TestCar {
public static void main(String[] args) {
Car c1 = new Car();
c1.color = "red";
c1.brand = "xxx";/pic/p>
}
}
class Car {
String color;
String brand;
void run() {
System.out.printf("I am running...running..running~~~~n");
}
void showMessage() {
System.out.printf("汽車(chē)顏色:%s, 汽車(chē)品牌:%sn", color, brand);
}
}
改進(jìn)后的TestCar_EX.java
復(fù)制代碼 代碼如下:
/*什么是構(gòu)造方法*/
public class TestCar_EX {
public static void main(String[] args) {
Car c1 = new Car("red", "xxx");
}
}
class Car {
String color;
String brand;
public Car(String color, String brand) {
this.color = color; /pic/p>
this.brand = brand; /pic/p>
}
void run() {
System.out.printf("I am running...running..running~~~~n");
}
void showMessage() {
System.out.printf("汽車(chē)顏色:%s, 汽車(chē)品牌:%sn", color, brand);
}
}
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