I faced this issue because of lower version of Jdk. Previously I installed Jdk 1.7 and Android Studio 1.5.1, I got this issue. If you install Android Studio 1.5.1 or above JDK 1.8 required So Installing JDK 1.8 solved this issue.
I have this Java class I am trying to run using Eclipse Mars.1 IDE. Here’s the code : } When trying to run the following code I get the following error shown in my Eclipse console : Here’s the error log returned from program executions I tried: Updating Java to latest version. Update Windows Restart … Read more
The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool. This means that your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory. For example, starting a JVM like … Read more
A JAR file is actually just a ZIP file. It can contain anything – usually it contains compiled Java code (*.class), but sometimes also Java sourcecode (*.java). However, Java can be decompiled – in case the developer obfuscated his code you won’t get any useful class/function/variable names though.
You can use System.out.format() Example: Above code snippet should print the following formatted output: Edit:I found this library which simplifies such kind of formatting. It is also available on Maven.
Yes, contains is case sensitive. You can use java.util.regex.Pattern with the CASE_INSENSITIVE flag for case insensitive matching: EDIT: If s2 contains regex special characters (of which there are many) it’s important to quote it first. I’ve corrected my answer since it is the first one people will see, but vote up Matt Quail’s since he … Read more
A Runnable is basically a type of class (Runnable is an Interface) that can be put into a thread, describing what the thread is supposed to do. The Runnable Interface requires of the class to implement the method run() like so: And then use it like this: If you did not have the Runnable interface, … Read more
Go to URL in your browser: firefox – click on HTTPS certificate chain (the lock icon right next to URL address). Click “more info” > “security” > “show certificate” > “details” > “export..”. Pickup the name and choose file type example.cer chrome – click on site icon left to address in address bar, select “Certificate” … Read more
There are 2 good reasons for using a copy constructor instead of the constructor passing all parameters : when you have a complex object with many attributes it is much simpler to use the copy constructor if you add an attribute to your class, you just change the copy constructor to take this new attribute … Read more
I have Windows 7 64bit OS Installed on my laptop… When I open an application an error occurs: “Java runtime environment not found” in an error dialogue box. I have tried to solve the issue by re-installing of JRE and Java. But error remain same. Can somebody help me out. Thank You.