java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.hashCode()' on a null object reference

Stack Overflow | Payal Garg | 6 months ago
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    Stack Overflow | 6 months ago | Payal Garg
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.hashCode()' on a null object reference
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    Stack Overflow | 12 months ago | Mario Giordano Bueno Sarmiento
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.hashCode()' on a null object reference
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    Stack Overflow | 1 month ago | Man Xoor
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.hashCode()' on a null object reference
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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'int java.lang.String.hashCode()' on a null object reference

      at com.android.volley.Request.<init>()
    2. Android-Volley Library
      StringRequest.<init>
      1. com.android.volley.Request.<init>(Request.java:136)
      2. com.android.volley.toolbox.StringRequest.<init>(StringRequest.java:43)
      2 frames
    3. com.example.admin
      RegisterDialog$4.onClick
      1. com.example.admin.loginandregister.RegisterDialog$4$3.<init>(RegisterDialog.java:0)
      2. com.example.admin.loginandregister.RegisterDialog$4.onClick(RegisterDialog.java:136)
      2 frames
    4. Android Platform
      ActivityThread.main
      1. android.view.View.performClick(View.java:4793)
      2. android.view.View$PerformClick.run(View.java:19902)
      3. android.os.Handler.handleCallback(Handler.java:739)
      4. android.os.Handler.dispatchMessage(Handler.java:95)
      5. android.os.Looper.loop(Looper.java:135)
      6. android.app.ActivityThread.main(ActivityThread.java:5357)
      6 frames
    5. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      2. java.lang.reflect.Method.invoke(Method.java:372)
      2 frames
    6. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:952)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
      2 frames