Java 如何解决我遇到的多个“无法对非静态字段进行静态引用”错误？

我知道这个问题在这个网站上被问了很多次，但给出的答案似乎对我没有帮助。我对Java非常陌生

import javax.swing.JOptionPane;

public class Lab10 {

    String species, color, injuries, name, wiput, liput, locationFound, oiput;
    char gender;
    float weight, length;
    boolean hasShots, needsShots;
    int tagNumber, cageNumber, outcome;

    public static void main(String[] args) {
        strayAnimal(species, color, weight, length, injuries, locationFound, name);

    }

    public static void strayAnimal(String species, String color, float weight, float length, String injuries, String locationFound, String name) {
        species = JOptionPane.showInputDialog("Please enter the species of the animal: ");
        color = JOptionPane.showInputDialog("Please enter the color of the animal: ");
        wiput = JOptionPane.showInputDialog("Please enter the weight of the animal");
        weight = Float.parseFloat(wiput);
        liput = JOptionPane.showInputDialog("Please enter the lenght of the animal: ");
        length = Float.parseFloat(liput);
        locationFound = JOptionPane.showInputDialog("Please enter the location the animal was found(City, County, State): ");
        injuries = JOptionPane.showInputDialog("Please enter the injuries the animal has seperated with commas: ");

    }
    //public static char strayAnimal() {

    //}
    public static void setOutcome(int outcome) {
        oiput = JOptionPane.showInputDialog("Please enter a '0' if the animal has or will be terminated or a '1' if the animal has been saved: ");
        outcome = Integer.parseInt(oiput);
    }
    public void giveShots() {
        boolean giveShots;
        if (giveShots = true) {

        }
    }
    public static void needShots() {
        boolean needShots;
    }
}

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您有一个静态方法，例如SetOutput，它希望访问非静态变量，如Output。这是不允许的。

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必须使变量结果为静态或方法为非静态。

下面的变量必须为静态

String species, color, injuries, name, wiput, liput, locationFound, oiput;
char gender;
float weight, length;
boolean hasShots, needsShots;
int tagNumber, cageNumber, outcome;

因为不能使用非静态变量，所以在静态方法中

String species, color, injuries, name, wiput, liput, locationFound, oiput;
char gender;
float weight, length;
boolean hasShots, needsShots;
int tagNumber, cageNumber, outcome;

都是非静态类成员

像strayAnimals这样的方法是静态的。不能从静态方法引用任何非静态成员。您可以定义类的实例并使用该实例访问类成员

class Lab10 {
    public Lab10 instance;

    public static Lab10 getInstance() {
         if (instance == null) instance = new Lab10();
         return instance;
    }

    ...

    public static void strayAnimal(...) {
        Lab10 instance = Lab10.getInstance();
        // now you can use instance.wiput;
    }
}

---

或者将成员设置为静态。但是，第二个选项的副作用是破坏非静态方法

在任何参数中使用strayAnimal pass是没有意义的。 在那之后，你应该很好

它还有助于在实现之外运行类

public class Runner {
    public static void main(String[] args) {
        Lab10 lab = new Lab10();
        lab.strayAnimal();
    }
}

这门课很好

public class Lab10 {

    String species, color, injuries, name, wiput, liput, locationFound, oiput;
    char gender;
    float weight, length;
    boolean hasShots, needsShots;
    int tagNumber, cageNumber, outcome;


    public void strayAnimal(String species, String color, float weight, float length, String injuries, String locationFound, String name) {
        species = JOptionPane.showInputDialog("Please enter the species of the animal: ");
        color = JOptionPane.showInputDialog("Please enter the color of the animal: ");
        wiput = JOptionPane.showInputDialog("Please enter the weight of the animal");
        weight = Float.parseFloat(wiput);
        liput = JOptionPane.showInputDialog("Please enter the lenght of the animal: ");
        length = Float.parseFloat(liput);
        locationFound = JOptionPane.showInputDialog("Please enter the location the animal was found(City, County, State): ");
        injuries = JOptionPane.showInputDialog("Please enter the injuries the animal has seperated with commas: ");

    }

    public void setOutcome(int outcome) {
        oiput = JOptionPane.showInputDialog("Please enter a '0' if the animal has or will be terminated or a '1' if the animal has been saved: ");
        outcome = Integer.parseInt(oiput);
    }
    public void giveShots() {
        boolean giveShots;
        if (giveShots = true) {

        }
    }
    public void needShots() {
        boolean needShots;
    }
}