问题描述
帮忙看一下这是什么错误，拜谢~Exception in thread "main" java.lang.IllegalArgumentException: Argument cannot be nullat org.eclipse.swt.SWT.error(Unknown Source)at org.eclipse.swt.SWT.error(Unknown Source)at org.eclipse.swt.SWT.error(Unknown Source)at org.eclipse.swt.graphics.ImageLoader.load(Unknown Source)at org.eclipse.swt.graphics.ImageDataLoader.load(Unknown Source)at org.eclipse.swt.graphics.ImageData.<init>(Unknown Source)at org.eclipse.swt.graphics.Image.<init>(Unknown Source)at B.UsingImage.main(UsingImage.java:22)源代码如下：package B;import org.eclipse.swt.SWT;import org.eclipse.swt.graphics.Image;import org.eclipse.swt.widgets.Button;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Label;import org.eclipse.swt.widgets.Shell;public class UsingImage {public static void main(String[] args) {Display display = Display.getDefault();Shell shell = new Shell(display);shell.setSize(180, 150);shell.open();Image iconImage = display.getSystemImage(SWT.ICON_QUESTION);shell.setImage(iconImage);Image buttonImage = new Image(display, UsingImage.class.getResourceAsStream("buttonImage.gif"));Button button = new Button(shell, SWT.NONE);button.setBounds(10, 50, 140, 50);button.setImage(buttonImage);button.setText("Image Button");Label label = new Label(shell,SWT.NONE);label.setImage(buttonImage);label.setBounds(10,10,30,30);while (!shell.isDisposed()) {if (!display.readAndDispatch())display.sleep();}buttonImage.dispose();display.dispose();}}
解决方案
buttonImage.gif 需要放在 classpath的路径下
解决方案二：
iconImage 这个获取的是null所以不对
解决方案三：
22行，应该是buttonImage.gif文件没找到。
解决方案四：
第22行，参数不能为空。