How to fix Failed to load Main-Class manifest attribute from jar - Java Eclipse Netbeans Tutorial

If you have tried creating JAR file and running Java program form command line you may have encountered " Failed to load Main-Class man...

How to fix java.io.NotSerializableException: org.apache.log4j.Logger Error in Java

java.io.NotSerializableException: org.apache.log4j.Logger error says that instance of org.apache.lo4j.Logger is not Serializable. This err...

Invalid initial and maximum heap size in JVM - How to fix

I was getting "Invalid initial heap size: -Xms=1024M" while starting JVM and even after changing maximum heap size from 1024 to 5...

'javac' is not recognized as an internal or external command - cause and solution

So you are trying to compile your Java source file and getting " 'javac' is not recognized as an internal or external command...

java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver - cause and solution

java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver Exception comes when you try to connect Oracle database from Java program...