不兼容的类型；byte[] 无法转换为 byte

Question

(databaseForm.java)

public class databaseForm extends javax.swing.JFrame {

/**
 * Creates new form databaseForm
 */

String  imgPth = null;
public databaseForm() {
    initComponents();
}
              

private void jLabelCloseMouseClicked(java.awt.event.MouseEvent evt) {                                         
    // TODO add your handling code here:
    System.exit(0);

}                                        

private void jLabelMinMouseClicked(java.awt.event.MouseEvent evt) {                                       
    // TODO add your handling code here:
    this.setState(JFrame.ICONIFIED);

}                                      

private void jButtonBrowseActionPerformed(java.awt.event.ActionEvent evt) {        

    // TODO add your handling code here:
 
    Myfunc mf = new  Myfunc();
    imgPth = mf.browseImage(jLabelDataPic);
    System.out.println(imgPth);

}                                             

private void jButtonAddDataActionPerformed(java.awt.event.ActionEvent evt) {       

    // TODO add your handling code here:
   
    String snumber = jTextFieldSNumber.getText();
    String fname = jTextFieldFName.getText();
    String lname = jTextFieldLName.getText();
    String gender = jComboBoxGender.getSelectedItem().toString();
    String course = jComboBoxCourse.getSelectedItem().toString();
    String year = jComboBoxYear.getSelectedItem().toString();
    String section = jComboBoxSection.getSelectedItem().toString();
    String address = jTextAreaAddress.getText();

    byte[] img = null;
    try {
        
        Path pth = Paths.get(imgPth);
        img = Files.readAllBytes(pth);

    data d = new data(0, snumber, fname, lname, gender, course, year, section, img, address, 0);
    
}

(data.java)

public class data {

private int cid;
private String SNumber;
private String FName;
private String LName;
private String Gender;
private String Course;
private String Year;
private String Section;
private byte Image;
private String Address;
private int uid;

// Alt + Insert
// to generate constructor & getters & setters

public data() {}


public data(int cid, String SNumber, String FName, String LName, String Gender, String Course, String Year, String Section, byte Image,

String Address, int uid) { this.cid = cid; this.SNumber = SNumber; this.FName = FName; this.LName = LName; this.Gender = Gender; this.Course = Course; this.Year = Year; this.Section = Section; this.Image = Image; this.Address = Address; this.uid = uid; }

public int getCid() {
    return cid;
}

public void setCid(int cid) {
    this.cid = cid;
}

public String getSNumber() {
    return SNumber;
}

public void setSNumber(String SNumber) {
    this.SNumber = SNumber;
}

public String getFName() {
    return FName;
}

public void setFName(String FName) {
    this.FName = FName;
}

public String getLName() {
    return LName;
}

public void setLName(String LName) {
    this.LName = LName;
}

public String getGender() {
    return Gender;
}

public void setGender(String Gender) {
    this.Gender = Gender;
}

public String getCourse() {
    return Course;
}

public void setCourse(String Course) {
    this.Course = Course;
}

public String getYear() {
    return Year;
}

public void setYear(String Year) {
    this.Year = Year;
}

public String getSection() {
    return Section;
}

public void setSection(String Section) {
    this.Section = Section;
}

public byte getImage() {
    return Image;
}

public void setImage(byte Image) {
    this.Image = Image;
}

public String getAddress() {
    return Address;
}

public void setAddress(String Address) {
    this.Address = Address;
}

public int getUid() {
    return uid;
}

public void setUid(int uid) {
    this.uid = uid;
}


 }

Answer 1

在你的构造函数中，
public data(int cid, String SNumber, String FName, String LName, String Gender, String Course, String Year, String Section, byte Image,String Address, int uid)
你期望 Image 是字节类型但传递的是字节数组 byte[] img = null; 将 Data class 中 Image 属性的参数类型更改为 byte[]

不兼容的类型；byte[] 无法转换为 byte

incompatible types;byte[] cannot be converted to byte

java