If you are certain that you have a JDK installed (and not a JRE), you can specify the location of the JDK on the commandline when starting the installer (as mentioned in the error message you get). These FAQ entries might also help you: http://wiki.netbeans.org/FaqInstallJavahomehttp://wiki.netbeans.org/FaqSuitableJvmNotFound
Error: filecontent.java:15: unreported exception java.io.IOException; must be caught or declared to be thrown showfile(); ^ filecontent.java:78: unreported exception java.io.IOException; must be caught or declared to be thrown showfile(); ^ I have already thrown java.io.IOException, but still it shows these errors. My code:
NOTE : AsyncTask was deprecated in API level 30.AsyncTask | Android Developers This exception is thrown when an application attempts to perform a networking operation on its main thread. Run your code in AsyncTask: How to execute the task: In MainActivity.java file you can add this line within your oncreate() method Don’t forget to add … Read more
This line is throwing anNPE, producing an IllegalStateException in the exception chain: as you don’t initialize stopPort (or startPort) in your onCreate method. You should have something like: The statement simply declares the variable which is null by default. Only instances that have been instantiated can have their methods invoked.
Use the (excellent) JSON-Java library from json.org then toString can take a second argument to provide the name of the XML root node. This library is also able to convert XML to JSON using XML.toJSONObject(java.lang.String string) Check the Javadoc Link to the the github repository POM original post updated with new links
This is how you can do it. This code assumes the existance of a buffered image called ‘image’ (like your comment says)
An Iterable is a simple representation of a series of elements that can be iterated over. It does not have any iteration state such as a “current element”. Instead, it has one method that produces an Iterator. An Iterator is the object with iteration state. It lets you check if it has more elements using hasNext() and move to the next element … Read more
If the directory doesn’t exist you need to create it. Java won’t create it by itself since the File class is just a link to an entity that can also not exist at all. As you stated the error is that the file cannot be created. If you read the documentation of PrintWriter constructor you can see … Read more
You have to do a few things: define a new variable JAVA_HOME and assign to it exactly JDK installation location, like C:\java\jdk_1.8.0 update your Path variable with: %JAVA_HOME%\bin important point set it first to Path.Finally, your Path will look: %JAVA_HOME%\bin;C:\Program Files\Common Files\Oracle\Java\javapath;C:\Program Files\Common Files\Microsoft Shared\Windows open console and type: java -version The output should be something like: BTW your Path has some duplication. Just remove an unneeded part.
The basic paradigm in Java is that you write classes, and that those classes are instantiated. Instantiated objects (an instance of a class) have attributes associated with them (member variables) that affect their behavior; when the instance has its method executed it will refer to these variables. However, all objects of a particular type might … Read more