java.lang.ArrayIndexOutOfBoundsException: length=4; index=4 length array

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死守一世寂寞 2020-12-11 18:03

i have this error:

04-02 11:03:57.922: E/AndroidRuntime(18952): FATAL EXCEPTION: main
04-02 11:03:57.922: E/AndroidRuntime(18952): java.lang.ArrayIndexOutOfB


      
      
        
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                   天涯浪人
                                             
                
                
                (楼主)
            
              
              
                2020-12-11 18:27
              

            
            
                        
problem is your array may declared to have only 4 rooms, that means you can access maximum index of 3
but in above code you gonna access 4th index, then it will complain that your index bound in out,your lenth is 4,

you should use ArrayList instead of array,because Array can't be resize after declaration,
but you can add any number of objects to arraylist.

ArrayList