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

• 0 vote280 views1 answer

  Input using stringbuffer

  Java
• 0 vote262 views1 answer

  Android popBackStack to specific fragment

  Java
• 1 vote270 views2 answers

  Java instant to localdatetime

  Java
• 0 vote300 views1 answer

  The crystallization in time is the phenomenon that we call synchronization

  Java
• 0 vote250 views1 answer

  Labelled break statement in Java

  Java
• 0 vote276 views1 answer

  Hide steam games from friends

  Java
• -1 vote243 views1 answer

  Sorting algorithms in java

  Java
• 10 votes249 views4 answers

  Java sort 2d array

  Java
• -2 votes267 views1 answer

  Java get class by string name

  Java
• 1 vote277 views1 answer

  Android how to switch between activities

  Java