Javafxの画像表示の仕方

###実現したいこと
getClass().getResourceAsStreamをeclipseで使うとエラーが出ます
やさしいJava活用編を参考としているのですがまずeclipseの勉強した方がいいのでしょうか？

発生している問題・エラーメッセージ

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(LauncherImpl.java:389)
	at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
	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$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
	at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$1(LauncherImpl.java:182)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: Input stream must not be null
	at javafx.scene.image.Image.validateInputStream(Image.java:1128)
	at javafx.scene.image.Image.<init>(Image.java:706)
	at コントロールの応用.Sample4_7.start(Sample4_7.java:25)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$8(LauncherImpl.java:863)
	at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$7(PlatformImpl.java:326)
	at com.sun.javafx.application.PlatformImpl.lambda$null$5(PlatformImpl.java:295)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$6(PlatformImpl.java:294)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:186)
	... 1 more
Exception running application コントロールの応用.Sample4_7

該当のソースコード

package コントロールの応用;


import javafx.application.*;
import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.scene.paint.*;
import javafx.scene.text.*;
import javafx.scene.image.*;
public class Sample4_7 extends Application
{
	private Label[] lb = new Label[3];
	private Image im;
	public static void main(String[] args)
	{
		launch(args);
	}
	public void start(Stage stage)throws Exception
	{
		for (int i = 0; i < lb.length; i++) {
			lb[i] = new Label("車" + i + "はいかがですか");
		}
		im = new Image(getClass().getResourceAsStream("car.jpg"));
		lb[0].setGraphic(new ImageView(im));
		lb[1].setGraphic(new ImageView(im));
		lb[1].setContentDisplay(ContentDisplay.RIGHT);
		lb[2].setBackground(new Background(new BackgroundFill(Color.WHITE, null, null)));
		
		BorderPane bp = new BorderPane();
		VBox vb = new VBox();
		
		for (int i = 0; i < lb.length; i++) {
			vb.getChildren().add(lb[i]);
		}
		bp.setCenter(vb);
		Scene sc = new Scene(bp, 300, 200);
		stage.setScene(sc);
		stage.setTitle("サンプル");
		stage.show();
	}
}