Adding values to an array in java

Question

int   tall   new int 28123    for  int j   1 j  lt   28123  j         int x   0      tall x    j      x        What is wrong with this code  Shouldn t this code do the following    Create an array named tall with a size of 28123  Make index 0   1  index 1   2 and so on

User · Answer

You have not one  but many mistakes  It should be   int   tall   new int 28123    for  int j 0 j lt 28123 j         tall j    j 1      Your code is putting a 0 in all the positions of the array    Morover  it ll throw an exception  because the last index of the array is 28123-1  arrays in Java start in 0

User · Answer

First line   array created  Third line loop started from j   1 to j   28123  Fourth line you give the variable x value  0  each time the loop is accessed  Fifth line you put the value of j in the index 0  Sixth line you do increment to the value x by 1  but it will be reset to 0 at line 4

User · Answer

You always set x to 0 before changing array s value   You can use   int   tall   new int 28123    for  int j   0 j lt 28123 j            Or whatever value you want to set      tall j    j   1      Or just remove the initialization of x  int x 0  before the for loop

User · Answer

public class Array       static int a     new int 101       int counter   0      public int add int num            if  num  lt   100                Array a this counter    num              System out println a this counter                this counter                 return add num   1                     return 0             public static void main String   args            Array c   new Array            c add 1

User · Answer

put x 0 outside the for loop that is the problem

User · Answer

No  you re re-initializing x in every loop  Change to   int   tall   new int 28123   int x   0   for  int j   1 j lt  28123 j         tall x    j      x        Or  even better  since x is always equal to j-1    int   tall   new int 28123    for  int j   1 j lt  28123 j         tall j-1    j

User · Answer

I suggest you step through the code in your debugger as debugging programs is what it is for   What I would expect you would see is that every time the code loops int x   0  is set

[java] Adding values to an array in java

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