illegalargumentexception

问题 when I tested my code with JUnit, the following error occured: java.lang.IllegalArgumentException: Color parameter outside of expected range: Red Green Blue Honestly, I don't know why. My code is not very long, so I would like to post it for better help. BufferedImage img = ImageIO.read(f); for (int w = 0; w < img.getWidth(); w++) { for (int h = 0; h < img.getHeight(); h++) { Color color = new Color(img.getRGB(w, h)); float greyscale = ((0.299f * color.getRed()) + (0.587f * color.getGreen())

问题 I have a Listview that I want to populate with information from my SQLite database with and this seemed like the most practical solution. In my debugger it says it's caused by: IllegalArgumentException No such column. Id does not exist This is the java file I'm trying to populate it with: data = new MyData(this); ListView lv = (ListView) findViewById(R.id.list); ListAdapter adapter = new SimpleCursorAdapter( this, R.layout.list, data.selectData(), new String[] { "name", "title" }, new int[] {

问题 I am implementing browser kind of project and I am getting an exception. import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.GridBagConstraints; import java.awt.Insets; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.SwingUtilities; import chrriis.dj.nativeswing.swtimpl.NativeInterface; import chrriis.dj.nativeswing.swtimpl.components.JWebBrowser; public class WebPageDisplay extends JPanel{ public WebPageDisplay() { super(new BorderLayout());

问题 I am implementing browser kind of project and I am getting an exception. import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.GridBagConstraints; import java.awt.Insets; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.SwingUtilities; import chrriis.dj.nativeswing.swtimpl.NativeInterface; import chrriis.dj.nativeswing.swtimpl.components.JWebBrowser; public class WebPageDisplay extends JPanel{ public WebPageDisplay() { super(new BorderLayout());

问题 I am trying to execute URL using RestTemplate like this - public static void main(String[] args) throws UnsupportedEncodingException { RestTemplate restTemplate = new RestTemplate(); String url = "http://ptr.vip.host.com/pss/repositories/pssdb/branches/main/query/Service[@alias=" + "hello" + "].serviceInstances.runsOn{@resourceId}?allowScan=true&limit=10000&skip=0"; try { String response = restTemplate.getForObject(url, String.class); System.out.println(response); } catch (RestClientException

问题 I passed %%#@-01-01 as date format, but got no exception. Why? SimpleDateFormat df = null; df = new SimpleDateFormat("%%#@-01-01"); 回答1: Quoting the javadoc for SimpleDateFormat: [...] unquoted letters from 'A' to 'Z' and from 'a' to 'z' are interpreted as pattern letters representing the components of a date or time string. Text can be quoted using single quotes (') to avoid interpretation. "''" represents a single quote. All other characters are not interpreted ; they're simply copied into

问题 This exception is showing up when a particular dialogFragment is launched. I am confused because it's not showing my any of my project classes hence I don't know how to fix this. Moreover, I am not using the Bitmap class in the fragment so this is really confusing. Please do you have a solution for it? 09-27 12:11:47.440 4381-4381/com.ozuf.weper E/AndroidRuntime: FATAL EXCEPTION: main Process: com.ozuf.weper, PID: 4381 java.lang.IllegalArgumentException: bitmap size exceeds 32 bits at android

问题 I am working on a web-app with Spring MVC. This is the exception I am getting: Exception while loading the app : java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: org.apache.catalina.LifecycleException: java.lang.IllegalArgumentException: Can not set com.onclave.papercraft.DAO.tenantDAO.Implementation.UsersDAOImplementation field com.onclave.papercraft.DAO.tenantDAO.Controller.UsersDAOController.usersDAOImplementation to com.sun.proxy.

问题 Why does this code throw an IllegalArgumentException when the tool bar is dragged off the GUI, then closed (to return it to the GUI)? I could understand why it might be improper to add a component with no constraint, but in this case, the initial addition of the toolbar to the panel (which uses GridBagLayout ) without a constraint causes no such problem. Why should it occur the 2nd and subsequent times it is added? The code is adapted from this answer, but both codes show the same problem.

问题 Let's start with the Javadocs: IllegalStateException Signals that a method has been invoked at an illegal or inappropriate time. In other words, the Java environment or Java application is not in an appropriate state for the requested operation. IllegalArgumentException Thrown to indicate that a method has been passed an illegal or inappropriate argument. The problem with the above is that they are very black and white. Consider a use case where a method is parsing a file provided by the