array index out of bounds in java -

i trying make program wherein user prompt on how many inputs input. have 3 user inputs in multi array, if user input 1 1 user input appear. otherwise, if user inputs 2 or 3, 2 or 3 user inputs appear. upon testing program, ran, java.lang.arrayindexoutofboundsexception error appeared. can't seem find error in here, i've tried adding index on multi array still same error.

import java.io.*;   public class student {  private int stud_id; private string stud_prog; object ctr1;  bufferedreader in = new bufferedreader(new inputstreamreader(system.in));  object stud [][] = {{1,2,3},{"enter name:","enter age:","enter gender:"}};  public void stud() throws numberformatexception,ioexception{      system.out.print("enter how many inputs: ");     int num1 = integer.parseint(in.readline());     (int x = 1; x<=num1;x++){         (int = 0 ; i<num1;){              system.out.println(stud[x][i]);             ctr1 =in.readline();             i++;          }      }   }    } 

///////////////////////////////////////////////////////////////////main/////////////////////////////////////////////////////////////////////////////////

import java.io.ioexception;   public class persontest {  public static void main(string[]args) throws numberformatexception,ioexception{      student s = new student();     s.stud();    }  } 

array index starts 0 , end length-1

change:

for (int x = 1; x<=num1;x++){ 

to:

for (int x = 0; x<num1;x++){ 

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first check length of array before iterating

if(num1<=stud.length){     (int x = 0; x<num1;x++){          ....     } } 

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note: multidimensional array can contains variable no of columns. should use stud[row].length no of columns of row.

• stud.length gives no of rows
• stud[i].length gives no of columns of ith row

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as per comment

what mean if user inputs 1 1 user attribute appear, if 2 2 , on...

is looking for?

string stud[] = { "enter name:", "enter age:", "enter gender:" };  system.out.print("enter how many inputs: "); int num1 = integer.parseint(in.readline()); if (num1 <= stud.length) {     (int x = 0; x < num1; x++) {         system.out.println(stud[x]);         //read input user     } }