Java

My guess is you miss the JRE Runtime Library in your project. But this would cause all the java.* classes to generate this message! Can you post your code so we can see what might be the problem? try doing : right-click on your project. ->properites ->java Build Path ->tab Librairies check if the JRE … Read more

You can find all the details here: IDEA-170117 “objc: Class JavaLaunchHelper is implemented in both …” warning in Run consoles It’s the old bug in Java on Mac that got triggered by the Java Agent being used by the IDE when starting the app. This message is harmless and is safe to ignore. Oracle developer’s … Read more

see here: Java Tool Doc, it says, -XmxnSpecify the maximum size, in bytes, of the memory allocation pool. This value must a multiple of 1024 greater than 2MB. Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes. The default value is 64MB. The upper limit for this value will … Read more

I am trying to create a message with a Yes or No button. Then a window will appear with a certain message that depends on if the user clicked Yes or No. Here is my code: public class test{ public static void main(String[] args){ //default icon, custom title int n = JOptionPane.showConfirmDialog( null, “Would you … Read more

How to know if a given string is substring from another string in Java

IntelliJ IDEA “The selected directory is not a valid home for JDK”

Can anyone guide me on how I can use a simple timeout in java? Basically in my project I’m executing a statement br.readLine(), which is reading a response from a modem. But sometimes the modem isn’t responding. For that purpose I want to add a timeout. I’m looking for a code like: try { String … Read more

:text will fail for a input with a type value of hidden. It’s also much more efficient to just use: $(“#texens”).val(“tinkumaster”); ID attributes should be unique on a web page, make sure yours are as this may contribute to any problems you’re having, and specifying a more complicated selector just slows things down and doesn’t … Read more

You haven’t provided Spring Boot with enough information to auto-configure a DataSource. To do so, you’ll need to add some properties to application.properties with the spring.datasource prefix. Take a look at DataSourceProperties to see all of the properties that you can set. You’ll need to provide the appropriate url and driver class name: spring.datasource.url = … Read more