TestCar.java
class Car {
String color;
String brand;
void run() {
System.out.printf("I am running...running..running~~~~/n");
}
void showMessage() {
System.out.printf("汽车颜色:%s, 汽车品牌:%s/n", color, brand);
}
}
改进后的TestCar_EX.java
class Car {
String color;
String brand;
public Car(String color, String brand) {
this.color = color; //这里的this是这个对象的意思.第一个color是这个对象的color属性,第二个是局部变量color
this.brand = brand; //同上
}
void run() {
System.out.printf("I am running...running..running~~~~/n");
}
void showMessage() {
System.out.printf("汽车颜色:%s, 汽车品牌:%s/n", color, brand);
}
}
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