大家好,此刻,我的toString()看起來是這樣的:在一個toString使用繼承/擴展的具體類名()
public String toString()
{
return ("A " + size + "cm " + weight + "kg Fish");
}
打印出這樣的事情:「一個16釐米0.2千克魚「
我在找它打印出類似這樣的內容:」一個16釐米的0.2千克的低音「,其中巴斯繼承了它的屬性,從NonEndangeredFish
類,它的屬性從Fish
類。至字符串當前位於Fish
類。這是Fish
類:
public abstract class Fish
{
// Any fish below this size must be thrown back into the lake
public static int THROW_BACK_SIZE = 18;
public static float WEIGHT_LIMIT = 10;
protected float weight;
protected int size;
public Fish(int aSize, float aWeight)
{
size = aSize;
weight = aWeight;
}
public boolean isDesirableTo(Fisher f)
{
if(canKeep() && f.numFishCaught < f.LIMIT && this.weight + f.sumOfWeight < WEIGHT_LIMIT)
{
return true;
}
else
{
return false;
}
}
public abstract boolean canKeep();
public int getSize() { return size; }
public float getWeight() { return weight; }
public String toString()
{
return ("A " + size + "cm " + weight + "kg");
}
這是超類。一個EndangeredFish類和一個NonEndangeredFish類擴展了Fish類(它們都是抽象的)。然後,Perch類和Bass類擴展了NonEndangeredFish類和AtlanticWhiteFish類,AuroraTrout類擴展了Endangered類。我的問題是如何在toString()中使用類名?我嘗試在Perch,AuroraTrout,AtlanticWhiteFish和Bass中聲明一個名稱並在toString中使用它的字符串,並且它不起作用,然後我嘗試在fish類中聲明一個名稱(一個String),然後使用三個參數構造一個構造函數但沒有工作,所以我真的卡住了。這是如何添加魚:
public class FishingTestProgram2
{
public static void main(String [] args)
{
// Create a big lake with 15 fish
Lake weirdLake = new Lake(15);
weirdLake.add(new AuroraTrout(76, 6.1f));
weirdLake.add(new Perch(32, 0.4f));
weirdLake.add(new Bass(20, 0.9f));
weirdLake.add(new Perch(30, 0.4f));
weirdLake.add(new AtlanticWhiteFish(140, 7.4f));
weirdLake.add(new Bass(15, 0.3f));
weirdLake.add(new Bass(90, 5.9f));
weirdLake.add(new Bass(120, 6.8f));
weirdLake.add(new AtlanticWhiteFish(80, 4.8f));
weirdLake.add(new AuroraTrout(42, 3.2f));
weirdLake.add(new Bass(100, 5.6f));
weirdLake.add(new Bass(45, 2.0f));
weirdLake.add(new Perch(16, 0.2f));
weirdLake.add(new Bass(30, 1.2f));
weirdLake.add(new Perch(7, 0.1f));
任何幫助表示讚賞謝謝!
我會將getSimpleName()方法放在Endangered和NonEndangered子類中? – user3330114
nope,在'魚'中,這是繼承的偉大之處(不是在這裏諷刺,我的意思是它) – Camilo