我正在使用NetBeans IDE在javafx中开发一个项目。现在我想从另一个包中的类调用其他包中的类的方法。两个包都在同一个项目下。我的主要课程代码如下：
package welcomepage;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.scene.control.Tooltip;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.stage.Stage;
import help.*;
public class WelcomePage extends Application {
@Override
public void start(Stage stage) {
BorderPane border = new BorderPane();
border.setTop(addVBox());
border.setLeft(addVBox1());
Scene scene = new Scene(border,700,450);
stage.setScene(scene);
stage.setResizable(false);
scene.getStylesheets().add
(WelcomePage.class.getResource("WelcomePage.css").toExternalForm());
stage.show();
}
private VBox addVBox() {
VBox vbox = new VBox();
vbox.setPadding(new Insets(5, 12, 5, 20));
vbox.setSpacing(10); // Gap between nodes
Image image = new Image(getClass().getResourceAsStream("logo11.png"));
Label lb1=new Label(" C - MARK AND ATTENDANCE CALCULATOR");
lb1.setAlignment(Pos.CENTER);
lb1.setFont(Font.font("Calibri",FontWeight.BOLD,28));
lb1.setTextFill(Color.BLACK);
lb1.setGraphic(new ImageView(image));
vbox.getChildren().addAll(lb1);
return vbox;
}
private VBox addVBox1()
{
VBox vbox1=new VBox();
vbox1.setPadding(new Insets(20, 2, 15, 20));
vbox1.setSpacing(20);
Button btnl2=new Button("SIGN IN");
btnl2.setFont(Font.font("Calibri",FontWeight.BOLD,16));
btnl2.setPrefSize(300,60);
btnl2.setStyle(" -fx-base: #0066cc;");
//Image imageOk = new Image(getClass().getResourceAsStream("icon22.png"));
//btnl2.setGraphic(new ImageView(imageOk));
final Tooltip tooltip2 = new Tooltip();
tooltip2.setText("If you have an account,\nSign in here.");
btnl2.setTooltip(tooltip2);
btnl2.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent e) {
signin();
}
});
Button btnl4=new Button("HELP");
btnl4.setFont(Font.font("Calibri",FontWeight.BOLD,16));
btnl4.setPrefSize(300,60);
btnl4.setStyle(" -fx-base: #0066cc;");
final Tooltip tooltip4 = new Tooltip();
tooltip4.setText("Get help content\nabout this software.");
btnl4.setTooltip(tooltip4);
btnl4.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent e) {
// I want to call the method of other class here.
}
});
Button btnl5=new Button("ABOUT");
btnl5.setFont(Font.font("Calibri",FontWeight.BOLD,16));
btnl5.setPrefSize(300,60);
btnl5.setStyle(" -fx-base: #0066cc;");
final Tooltip tooltip5 = new Tooltip();
tooltip5.setText("Know about\nthis software.");
btnl5.setTooltip(tooltip5);
btnl5.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent e) {
about();
}
});
Button btnl6=new Button("EXIT");
btnl6.setFont(Font.font("Calibri",FontWeight.BOLD,16));
btnl6.setPrefSize(300,60);
btnl6.setStyle(" -fx-base: #0066cc;");
final Tooltip tooltip6 = new Tooltip();
tooltip6.setText("Exit if you had\nfinished your works.");
btnl6.setTooltip(tooltip6);
btnl6.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent e) {
System.exit(0);
}
});
vbox1.getChildren().addAll(btnl2,btnl4,btnl5,btnl6);
return vbox1;
}
public void signin()
{
Stage stage=new Stage();
BorderPane border = new BorderPane();
border.setTop(loginHBox1());
border.setLeft(loginVBox1());
border.setRight(loginVBox2());
Scene scene = new Scene(border,700,450);
stage.setScene(scene);
stage.setResizable(false);
scene.getStylesheets().add
(Login.class.getResource("Login.css").toExternalForm());
stage.show();
}
private HBox loginHBox1() {
HBox hbox = new HBox();
hbox.setPadding(new Insets(15, 12, 10, 180));
hbox.setSpacing(10);
Label lb1=new Label("LOG IN OR CREATE NEW ACCOUNT");
lb1.setAlignment(Pos.CENTER);
lb1.setFont(Font.font("Calibri",FontWeight.BOLD,26));
lb1.setTextFill(Color.BLACK);
hbox.getChildren().addAll(lb1);
return hbox;
}
private VBox loginVBox1() {
VBox hbox = new VBox();
hbox.setPadding(new Insets(20,30,15,50));
hbox.setSpacing(10);
Label lb3=new Label("LOG IN");
lb3.setAlignment(Pos.CENTER);
lb3.setFont(Font.font("Calibri",FontWeight.BOLD,24));
lb3.setTextFill(Color.BLACK);
Label lb1=new Label("Username");
lb1.setAlignment(Pos.CENTER);
lb1.setFont(Font.font("Calibri",FontWeight.BOLD,16));
lb1.setTextFill(Color.BLACK);
TextField t1=new TextField();
t1.setPrefSize(150,30);
Label lb2=new Label("Password");
lb2.setAlignment(Pos.CENTER);
lb2.setFont(Font.font("Calibri",FontWeight.BOLD,16));
lb2.setTextFill(Color.BLACK);
PasswordField pw1=new PasswordField();
pw1.setPrefSize(150,30);
Button b1=new Button("LOG IN");
b1.setFont(Font.font("Calibri",FontWeight.BOLD,16));
b1.setPrefSize(80,5);
hbox.getChildren().addAll(lb3,lb1,t1,lb2,pw1,b1);
return hbox;
}
private VBox loginVBox2()
{
VBox hbox1 = new VBox();
hbox1.setPadding(new Insets(15, 50, 15, 10));
hbox1.setSpacing(10);
Label lb4=new Label("CREATE NEW ACCOUNT");
lb4.setFont(Font.font("Calibri",FontWeight.BOLD,24));
lb4.setPrefSize(250,30);
lb4.setTextFill(Color.BLACK);
Label lb1=new Label("Full Name ");
lb1.setFont(Font.font("Calibri",FontWeight.BOLD,18));
lb1.setPrefSize(100, 30);
lb1.setTextFill(Color.BLACK);
TextField t1=new TextField();
t1.setPrefSize(50,30);
Label lb2=new Label("User Name ");
lb2.setFont(Font.font("Calibri",FontWeight.BOLD,18));
lb2.setPrefSize(150, 30);
lb2.setTextFill(Color.BLACK);
TextField t2=new TextField();
t2.setPrefSize(100,30);
Label lb3=new Label("Password ");
lb3.setFont(Font.font("Calibri",FontWeight.BOLD,18));
lb3.setPrefSize(150, 30);
lb3.setTextFill(Color.BLACK);
PasswordField t3=new PasswordField();
t3.setPrefSize(100,30);
Label lb5=new Label("Gender ");
lb5.setFont(Font.font("Calibri",FontWeight.BOLD,18));
lb5.setPrefSize(150, 30);
lb5.setTextFill(Color.BLACK);
ObservableList<String> options2 =
FXCollections.observableArrayList(
"Male","Female");
final ComboBox comboBox2 = new ComboBox(options2);
comboBox2.setPrefSize(250,30);
Button btn1=new Button("CREATE");
btn1.setFont(Font.font("Calibri",FontWeight.BOLD,18));
btn1.setPrefSize(100,30);
hbox1.getChildren().addAll(lb4,lb1,t1,lb2,t2,lb3,t3,lb5,comboBox2,btn1);
return hbox1;
}
public void about() {
Stage stage=new Stage();
BorderPane border = new BorderPane();
HBox hbox11 = aboutHBox1();
border.setTop(hbox11);
border.setCenter(aboutVBox1());
border.setBottom(aboutHBox2());
Scene scene = new Scene(border,700,450);
stage.setScene(scene);
stage.setResizable(false);
scene.getStylesheets().add
(About.class.getResource("About.css").toExternalForm());
stage.show();
}
private HBox aboutHBox1() {
HBox hbox11 = new HBox();
hbox11.setPadding(new Insets(15, 12, 15, 320));
hbox11.setSpacing(10);
hbox11.setStyle("-fx-background-color: #336699;");
Label lb1=new Label("ABOUT");
lb1.setAlignment(Pos.CENTER);
lb1.setFont(Font.font("Trebuchet MS",FontWeight.BOLD,20));
hbox11.getChildren().addAll(lb1);
return hbox11;
}
private VBox aboutVBox1() {
VBox vbox11 = new VBox();
vbox11.setPadding(new Insets(20));
vbox11.setSpacing(5);
Label l1=new Label("C - MARK AND ATTENDANCE CALCULATOR");
l1.setFont(Font.font("Calibri",FontWeight.BOLD,20));
l1.setTextFill(Color.GREEN);
Label l2=new Label("\nSoftware to calculate C-mark and attendance easily.\n"
+ "Supported in Windows XP or above.\n"
+ "Developed using Java.\n"
+ "Advantages : Simple user interface, Easy usage.\n\n"
+ "Developed by :\n"
+ "\t\t Adarsh P.S \n"
+ "\t\t Akhilnath A.R \n"
+ "\t\t Arjun P Das \n"
+ "\t\t Tomin Jacob ");
l2.setFont(Font.font("Calibri",FontWeight.BOLD,18));
l2.setTextFill(Color.GREEN);
vbox11.getChildren().addAll(l1,l2);
return vbox11;
}
private HBox aboutHBox2()
{
HBox hbox12 = new HBox();
hbox12.setPadding(new Insets(15, 12, 15, 300));
Button btn1=new Button("BACK");
btn1.setFont(Font.font("Calibri",FontWeight.BOLD,18));
btn1.setPrefSize(100,40);
btn1.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent e) {
}
});
hbox12.getChildren().addAll(btn1);
return hbox12;
}
public static void main(String[] args) {
launch(args);
}
}
我评论了我要打电话给另一个班级的地方。以下是按下按钮时我想要使用的类的代码：
package help;
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.stage.Stage;
public class Help extends Application {
@Override
public void start(Stage stage) {
// Use a border pane as the root for scene
BorderPane border = new BorderPane();
HBox hbox = helpHBox1();
border.setTop(hbox);
border.setCenter(helpVBox1());
border.setBottom(helpHBox2());
Scene scene = new Scene(border,700,450);
stage.setScene(scene);
stage.setResizable(false);
scene.getStylesheets().add
(Help.class.getResource("Help.css").toExternalForm());
stage.show();
}
private HBox helpHBox1() {
HBox hbox = new HBox();
hbox.setPadding(new Insets(15, 12, 15, 300));
hbox.setSpacing(10); // Gap between nodes
hbox.setStyle("-fx-background-color: #336699;");
Label lb1=new Label("HELP");
lb1.setAlignment(Pos.CENTER);
lb1.setFont(Font.font("Trebuchet MS",FontWeight.BOLD,20));
hbox.getChildren().addAll(lb1);
return hbox;
}
private VBox helpVBox1() {
VBox vbox = new VBox();
vbox.setPadding(new Insets(20)); // Set all sides to 10
vbox.setSpacing(5); // Gap between nodes
Label l1=new Label("");
l1.setFont(Font.font("Calibri",FontWeight.BOLD,20));
l1.setTextFill(Color.GREEN);
vbox.getChildren().addAll(l1);
return vbox;
}
private HBox helpHBox2()
{
HBox hbox1 = new HBox();
hbox1.setPadding(new Insets(15, 12, 15, 300));
Button btn1=new Button("BACK");
btn1.setFont(Font.font("Calibri",FontWeight.BOLD,18));
btn1.setPrefSize(100,40);
hbox1.getChildren().addAll(btn1);
return hbox1;
}
/**
* The main() method is ignored in correctly deployed JavaFX application.
* main() serves only as fallback in case the application can not be
* launched through deployment artifacts, e.g., in IDEs with limited FX
* support. NetBeans ignores main().
*
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
答案 0 :(得分：2)
以下解决方案基于您的问题'现在我想从另一个包中的类调用其他包中的类的方法。'根据代码
Class -1
Package abc;
Class A
{
public void demo()
{
////////Code
}
}
Class -2
Package def;
import abc.A;
Class B
{
public static void main(String arg[])
{
A obj = new A();
obj.demo(); // Class A method is called from Class B which is in different package.
}
}
答案 1 :(得分：0)
你可以实例化另一个类的对象并调用你需要的方法，或者按照单例模式调用你需要的方法而不创建提到的对象。