java - Why i am getting this output while printing numbers numbers of a particular interval -

i trying print the numbers in between particular intervals taking starting, ending interval range of particular interval not able correct output.

i using scanner class take input user.
have used start1, start2 , end1, end2 of 2 intervals show starting , ending range.

import java.util.scanner; public class smallest234number {     public static void smallest2nointerval(int p[],int x[])       {         system.out.println("first interval");          for(int k=0;k<p.length;k++)         {             system.out.println(p[k++]);         }         system.out.println("second interval");          for(int k=0;k<x.length;k++)         {             system.out.println(x[k++]);         }     }      public static void main(string[] args)     {         int ar1[]=new int[10];         int ar2[]=new int[10];          int i=0;         int s=0;          // have taken 2 intervals base         system.out.println("enter first interval");         scanner sc=new scanner(system.in);         system.out.println("enter first of starting interval");         int startno1=sc.nextint();         //now take input user startno          system.out.println("enter end of  starting interval");         int endno1=sc.nextint();         //now take input user endno          system.out.println("enter second interval");         system.out.println("enter first of second interval");         int startno2=sc.nextint();          //now take input of 2interval  user startno1          system.out.println("enter end of second interval");         int endno2=sc.nextint();          //now take input of 2interval  user endno1          system.out.println("enter first interval nos between start   no , end no");          system.out.println("enter first interval nos between   start no , end no");         for(int a=startno1;a<=endno1;a++)        {             int inputno=sc.nextint();               if(inputno<=endno1&&inputno>=startno1)             {                 ar1[s]=inputno;                 s++;             }         }         system.out.println("enter second interval nos between start no1 , end no1");         for(int a=startno2;a<=endno2;a++)        {             int inputno=sc.nextint();               if(inputno<=endno1&&inputno>=startno1)             {                 ar2[i]=inputno;                 i++;              }          }         smallest2nointerval(ar1,ar2);     } }  **output shown:**  enter first interval enter first of starting interval 1 enter end of  starting interval 3 enter second interval enter first of second interval 2 enter end of second interval 4 enter first interval nos between start no , end no enter first interval nos between start no , end no 1 2 3 enter second interval nos between start no1 , end no1 2 3 4 first interval 1 3 0 0 0 second interval 2 0 0 0 0 

you using same variable i indexing in both arrays ar1 , ar2 that's why program puts integers on first 2 places in ar1 , 3rd place in ar2. shall use different index variables or reset i=0 before putting values in ar2.

edit problem in printing logic

for(int k=0;k<p.length;k++) {     system.out.println(p[k++]); } system.out.println("second interval");  for(int k=0;k<x.length;k++) {     system.out.println(x[k++]); } 

you incrementing index variable twice in loop please correct this:

for(int k=0;k<p.length;k++) {     system.out.println(p[k]); } system.out.println("second interval");  for(int k=0;k<x.length;k++) {     system.out.println(x[k]); }