Java-货船

DangerException类

public class DangerException extends Exception {
	final String message="超重";
	public String warnMess(){
		return message;
	}
}

 

CargoBoat类

public class CargoBoat {
	int realContent;
	int maxContent;
	public void setMaxContent(int c){
		maxContent=c;
	}
	public void loading(int m) throws DangerException{
		realContent+=m;
		if(realContent>maxContent){
			realContent-=m;
			throw new DangerException();
		}
		System.out.println("目前装载了"+realContent+"吨货物");
	}

}

 

Example7_7类

public class Example7_7 {
	public static void main(String[] args) {
		CargoBoat ship=new CargoBoat();
		ship.setMaxContent(1000);
		int m=600;
		try{
			ship.loading(m);
			m=400;
			ship.loading(m);
			m=367;
			ship.loading(m);
			m=555;
			ship.loading(m);
		}
		catch(DangerException e){
			System.out.println(e.warnMess());
			System.out.println("无法再装载的重量是"+m+"吨的集装箱");
		}
		finally{
			System.out.printf("货船将正点起航");
		}

	}

}