Java.lang.nullpointerexception: attempt to invoke virtual method 'long java.lang.long.longvalue()' on a null object reference

• 3 votes150 views1 answer

  Android java close app

  Java
• 1 vote164 views1 answer

  Java stream sorted reverse

  Java
• 3 votes163 views1 answer

  Copy arraylist java

  Java
• 6 votes169 views1 answer

  How to close a jframe in java with an if statement

  Java
• 0 vote215 views1 answer

  Java comparing-two-csv-files-in-java

  Java
• 0 vote162 views1 answer

  Reading data from wsdl in java

  Java
• 7 votes237 views1 answer

  Solid principles in programming

  Java
• 1 vote207 views2 answers

  Java text file to arraylist

  Java
• 0 vote165 views1 answer

  Difference between maven plugin and dependency

  Java
• 2 votes157 views1 answer

  Create a min heap in java using priority queue

  Java