JAVA 範例 ch08 Sample4_ex

傳遞變數的值

//車子類別
class Car
{
 int num;
 double gas;
 
 void setNum(int n)
 {
  num=n;
  System.out.println("將車號設為" + num + "。");
 }
 
 void setGas(double g)
 {
  gas=g;
  System.out.println("將汽油量設為" + gas + "。");
 } 
 void show()
 {
  System.out.println("車號是" + num + "。");
  System.out.println("汽油量是" + gas + "。");
 }
}

class Sample4_ex
{
 public static void main(String[] args)
 {
  Car car1=new Car();
  
  int number=1234;
  double gasoline=20.5;
  
  car1.setNum(number);   //也可以使用變數做為傳遞的引數
  car1.setGas(gasoline);
 }
}