Technology

What is editor does not contain a main type?

Joe Ford

What is editor does not contain a main type?

First look for the main method is there or not. If it is there, do restart your eclipse and right click on the page which having main method, Go to run as Java application. Ideally, the source code file should go within the src/default package even if you haven’t provided any package name.

What is a main type in Java?

Java main method is the entry point of any java program. Its syntax is always public static void main(String[] args) . Also String array argument can be written as String… args or String args[] .

What is exit code 13 in eclipse?

Exit code 13 shows that you have changed the java version. The change can be a switch from 64 to 32 bit java or vice versa!! I had this problem after changing my JAVA_HOME entry in Windows OS. In my case it was a wrong java version.

Why Eclipse is not opening?

If you’ve installed Eclipse but are having trouble getting it to run, the most likely cause is that you have not correctly specified the JVM for it to run under. Eclipse startup is controlled by the options in $ECLIPSE_HOME/eclipse. ini. If $ECLIPSE_HOME is not defined, the default eclipse.

What to do if Eclipse is not working?

Try the following approach:

  1. Find there a file . metadata\. log . This is a text file that should include some information about starting up, and the stack trace, if Java failed.
  2. JAVA_HOME : the path to the installation directory of your JDK.

Why does Eclipse take so long to start?

Check your workspace size. If its more than some 500 MB then its a problem. Drilldown to the file with maximum size and try to remove or move it out. If your workspace has many open Working Sets, depending on your settings at start-up Eclipse might be building them all.

How can I make my STS faster?

To resolve this issue, you can speed up SpringSource Tool Suite by completing these steps:

  1. Download the latest version of SpringSource Tool Suite.
  2. Disable validators. Go to Project > Spring > Project Validators.
  3. Deselect Spring Validators and STS Bean Validator.
  4. Disable Build Automatically.

How can I make Eclipse faster?

Make Eclipse Faster in 5 Minutes

  1. 1) Clean up history and indexes. Cleaning up history and indexes reduce the load on RAM, and overall HDD usage as well.
  2. 2) Remove structured text validation.
  3. 3) Do not use subclipse plugin.
  4. 4) Configure appropriate start-up arguments.
  5. Bonus Tip: Use -Xverify:none, -Xquickstart and -server OR -client in eclipse.

How do you make a lightweight Eclipse?

Install the JDT binary:

  1. Click Help → Install New Software → Add… → Archive.
  2. Choose the JDT zip file you downloaded.
  3. Uncheck Group Items by category.
  4. Select the Eclipse Java Development Tools.
  5. Click next to install and restart Eclipse when prompted.

How do you determine heap size?

Heap tuning guidelines Your total heap size must not exceed the amount of physical RAM available. You must leave some physical RAM for other applications to run on your machine. You should set Xms and Xmx to the same value for best performance. These options determine your total heap size.

What is JVM tuning?

JVM tuning mainly involves optimizing the garbage collector for better collection performance so that applications running on VMs can have a larger throughput while using less memory and experiencing lower latency.

What is JVM heap?

Heap memory is the run time data area from which the memory for all java class instances and arrays is allocated. The heap is created when the Java Virtual Machine starts up and may increase or decrease in size while the application runs. The size of the heap can be specified using –Xms VM option.

What are JVM parameters?

The following three JVM options specify initial and max heap size and thread stack size while running Java programs: -Xms – set initial Java heap size -Xmx – set maximum Java heap size -Xss – set java thread stack size. Parameter 2: Garbage Collector.