javaClassAr, Java - rextester

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//'main' method must be in a class 'Rextester'.
//openjdk version '11.0.5'

////////////////////////////////////////////////////////////////////////////////javaClassAr:Array member in Java class
//this code is  created by Rezaul Hoque on September 18,2022;
//contact:jewelmrh@yahoo.com;Dhaka,Bangladesh;https://rezaulhoque.wordpress.com,https://hoquestake.blogspot.com
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;
//////////////////////////////////////////////////////////////////////////////
import java.util.*;
import java.lang.*;
class Demo{
int[] k;
int[] a;
public Demo(){
  k=new int[]{10,9,8,15,19,1,3};
  a=new int[]{30,41,45,19,15,5,3};
}
public void display(){
System.out.println("Index   Value");
System.out.println("---------------------");
for(int m=0;m<7;m++){
if(a[m]>a[m+1]){
System.out.printf("%d\t%d\n",k[m],a[m]);
      }
    }
  }
}
class Rextester
{  
    public static void main(String args[])
    {
  Demo s=new Demo();
        s.display();
    }
}

[ + ] Show input
Compilation time: 0.51 sec, absolute running time: 0.19 sec, cpu time: 0.13 sec, memory peak: 36 Mb, absolute service time: 0,8 sec