java入門練習題

⑴ java練習題

publicclassVehicle{

	privateStringname;
	privateStringgender;
	privateintage;
	privateStringdriverLicense;
	privateStringplateNumber;
	
	publicStringgetName(){
		returnname;
	}
	publicvoidsetName(Stringname){
		this.name=name;
	}
	publicStringgetGender(){
		returngender;
	}
	publicvoidsetGender(Stringgender){
		this.gender=gender;
	}
	publicintgetAge(){
		returnage;
	}
	publicvoidsetAge(intage){
		this.age=age;
	}
	publicStringgetDriverLicense(){
		returndriverLicense;
	}
	publicvoidsetDriverLicense(StringdriverLicense){
		this.driverLicense=driverLicense;
	}
	publicStringgetPlateNumber(){
		returnplateNumber;
	}
	publicvoidsetPlateNumber(StringplateNumber){
		this.plateNumber=plateNumber;
	}
	
	@Override
	publicStringtoString(){
		return"Vehicle[name="+name+",gender="+gender+",age="+age+",driverLicense="+driverLicense
				+",plateNumber="+plateNumber+"]";
	}
	
	publicvoiddrive(){
		System.out.println(name+"司機正在開"+plateNumber+"牌號的車。");
	}
	
	publicvoidstop(){
		System.out.println(name+"司機把"+plateNumber+"牌號的車停了下來。");
	}
	
	publicbooleancheckName(Stringcheck){
		if(this.name!=null&&this.name!=""){
			returnthis.name.equals(check);
		}
		returnfalse;
	}
	
	publicbooleancheckPlateNumber(Stringcheck){
		if(this.plateNumber!=null&&this.plateNumber!=""){
			returnthis.plateNumber.equals(check);
		}
		returnfalse;
	}
}

懶得寫注釋了

⑵ java基礎練習題

		intoldArr[]={1,3,4,5,0,0,6,6,0,5,4,7,6,7,0,5};
		//建立一個list集合
		ArrayList<Integer>list=newArrayList<Integer>();
		for(inti=0;i<oldArr.length;i++){
			if(oldArr[i]>0){
				list.add(oldArr[i]);
			}
		}
		intnewArr[]=newint[list.size()];
		for(inti=0;i<list.size();i++){
			newArr[i]=list.get(i);
		}
		//另一種寫法，不過返回的應用型數據類型但是跟int也差不多
		IntegerlistArr[]=list.toArray(newInteger[list.size()]);

⑶ java編程基礎練習題

答案是抄C
A: num1=new double[num2+1];等價為：num1=new double[6];所以num1指向一個有襲6個元素的double型數組

B num2是一個整數

C:num1[num2]=num3;等價為：num1[5]=2.0;因為數組標識從0開始，所以num1[5]是最後一個元素

D: num1數組的第三個元素沒有賦值，默認應該是0.0；