请问下列错误是什么原因引起的

Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(Unknown Source)
at com.sun.javafx.application.LauncherImpl.launchApplication(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(Unknown Source)
at com.sun.javafx.application.LauncherImpl.access$000(Unknown Source)
at com.sun.javafx.application.LauncherImpl$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException: Invalid URL: unknown protocol: c
at javafx.scene.image.Image.validateUrl(Unknown Source)
at javafx.scene.image.Image.(Unknown Source)
at week11.MyJavaFX.start(MyJavaFX.java:25)
at com.sun.javafx.application.LauncherImpl$8.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl$7.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl$6$1.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl$6$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$6.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$300(Unknown Source)
at com.sun.glass.ui.win.WinApplication$4$1.run(Unknown Source)
... 1 more
Caused by: java.net.MalformedURLException: unknown protocol: c
at java.net.URL.(Unknown Source)
at java.net.URL.(Unknown Source)
at java.net.URL.(Unknown Source)
... 14 more
Exception running application week11.MyJavaFX

java.lang.reflect.InvocationTargetException
反射调用错误，一般是配置文件中某个类或者方法名写错，或者少包

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.geometry.Insets;
import javafx.stage.Stage;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;

public class MyJavaFX extends Application{
public static void main(String[] args){
Application.launch(args);
}

public void start(Stage primaryStage) throws Exception {
    GridPane pane = new GridPane();
    pane.setHgap(10);
    pane.setVgap(10);
    pane.setPadding(new Insets(10,10,10,10));

    Image image1 = new Image("bin/达康书记1.jpg");
    ImageView imageview1 = new ImageView(image1);
    imageview1.setFitHeight(300);
    imageview1.setFitWidth(500);
    pane.add(imageview1, 0, 0);

    Image image2 = new Image("bin/达康书记2.jpg");
    ImageView imageview2 = new ImageView(image2);
    imageview2.setFitHeight(300);
    imageview2.setFitWidth(500);
    pane.add(imageview2, 0, 1);

    Image image3 = new Image("bin/达康书记3.jpg");
    ImageView imageview3 = new ImageView(image3);
    imageview3.setFitHeight(300);
    imageview3.setFitWidth(500);
    pane.add(imageview3, 1, 0);

    Image image4 = new Image("bin/达康书记14.jpg");
    ImageView imageview4 = new ImageView(image4);
    imageview4.setFitHeight(300);
    imageview4.setFitWidth(500);
    pane.add(imageview4, 1, 1);


    Scene scene = new Scene(pane);
    primaryStage.setTitle("达康书记表情包");
    primaryStage.setScene(scene);
    primaryStage.show();

}

}