Question

在我的AP计算机科学课上，我们正在开发一个实验室，让我们创建一系列具有参数高度，重量和年龄的怪物对象。我们需要打印出Array，打印出最大和最小的数组，然后对数组进行排序。我正在努力比较两个物体的高度。而不是返回对象，它返回null。这是我的主要类文件。

package lab64;
import static java.lang.Integer.parseInt;
import java.util.Arrays;
import javax.swing.JOptionPane;

public class Monsterz 
{
    static String MONSTER;
    static Monster MONSTERS[];
    static int HT;
    static int WT;
    static int AGE;

    /* public Monsterz(int ht, int wt, int age)
    {
    } */

    public static void main(String[] args) 
    {
        MONSTER = JOptionPane.showInputDialog("Input number of monsters in the herd ::");
        int len = parseInt(MONSTER);
        MONSTERS = new Monster[len];
        for (int i = 0; i <= MONSTERS.length - 1; i++)
        {
            String Height = JOptionPane.showInputDialog("Input Ht ::");
            String Weight = JOptionPane.showInputDialog("Input Wt ::");
            String Age = JOptionPane.showInputDialog("Input Age ::");
            HT = parseInt(Height);
            WT = parseInt(Weight);
            AGE = parseInt(Age);
            MONSTERS[i] = new Monster(HT,WT,AGE);
        }
        JOptionPane.showMessageDialog(
                null, 
                "HERD :: " + Arrays.toString(MONSTERS) + "\nLARGEST :: " + getLargest(), 
                "Monster Lab", 
                JOptionPane.PLAIN_MESSAGE);

    } 
    public static Monster getLargest()
    {
        Monster largest = null;
        for(int c = 0; c > MONSTERS.length; c++)
        {
            if (MONSTERS[c].getHeight() > MONSTERS[c+1].getHeight())
            {
               largest = MONSTERS[c];
            }
        }
        return largest;
    }


}

这是Monster类文件

package lab64;
class Monster {

    int ht = 0;
    int wt = 0;
    int age = 0;
    Monster(int HT, int WT, int AGE) 
    {
        ht = HT;
        wt = WT;
        age = AGE;

    }
    public int getHeight()
    {
        return ht;
    }
    public int getWeight()
    {
        return wt;
    }
    public String toString()
    {
        return ht + " " + wt + " " + age;
    }

}

如何解决此问题以使其有效？

Answer 1

纠正你的状况。

更改for(int c = 0; c > MONSTERS.length; c++)

到

for(int c = 0; c < MONSTERS.length; c++)

同样纠正找到数组中最大元素的逻辑：

    Monster largest = MONSTERS[0];
    for(int c = 0; c < MONSTERS.length; c++)
    {
        if (largest.getHeight() > MONSTERS[c].getHeight())
        {
           largest = MONSTERS[c];
        }
    }

比较Java中的对象

1 个答案: