java - 不兼容的类型:无法转换为

我有一个类NewBeautifulKiwi，它具有getter和setter方法。

当我尝试设置以下内容时：

public void setKiwi(String Kiwi) {
    this.Kiwi = Kiwi;
}

来自TextField的值，例如：

@FXML
TextField KIWITextField;
NewBeautifulKiwi newBeautifulKiwi = new NewBeautifulKiwi()
    .setKiwi(KIWITextField.getText());

我收到错误消息：
    不兼容的类型：无法转换为NewBeautifulKiwi

这是完整的课程（此问题的必要摘录）

import java.net.URL;
import java.util.ResourceBundle;
import javafx.application.Platform;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TextField;
import javafx.scene.layout.Pane;
import wakiliproject.Forms.AddNew.DB.NewBeautifulKiwi;

public class SampleController implements Initializable, ControlledScreen {

    @FXML
    TextField KIWITextField;
    NewBeautifulKiwi newBeautifulKiwi = new NewBeautifulKiwi().setKiwi(KIWITextField.getText());
}


import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class NewBeautifulKiwi implements Serializable {

    @Id
    @GeneratedValue
    private int KiwiId;
    private String Kiwi;

    public int getKiwiId() {
        return KiwiId;
    }

    public void setKiwiId(int KiwiId) {
        this.KiwiId = KiwiId;
    }

    public String getKiwi() {
        return Kiwi;
    }

    public void setKiwi(String Kiwi) {
        this.Kiwi = Kiwi;
    }
}

如何将TextField值传递给设置器？

最佳答案

new NewBeautifulKiwi().setKiwi(KIWITextField.getText());的返回值由setKiwi的签名确定，即：public void setKiwi(String Kiwi)。

因此该表达式不返回任何内容（无效），并且您无法将其分配给变量。您可以拆分两个语句：

NewBeautifulKiwi newBeautifulKiwi = new NewBeautifulKiwi();
newBeautifulKiwi.setKiwi(KIWITextField.getText());

或使用流畅的界面风格（在这种情况下，我个人偏爱，因为它允许您链接设置员）：

public NewBeautifulKiwi setKiwi(String Kiwi) {
    this.Kiwi = Kiwi;
    return this;
}

//Now that will compile
NewBeautifulKiwi newBeautifulKiwi = new NewBeautifulKiwi().setKiwi(KIWITextField.getText());