Hallow Pattern Program In Java Language

 class Demo{

    public static void main(String args[])
    {
        int n=4;
        int m=5;

        //outer loop
        for(int i=1; i<=n; i++){
            //inner loop
            for(int j=1; j<=m; j++){
                if(i==1 || j==1 || i==n || j==m){
                    System.out.print("*");
                }
                else{
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }
}

OUTPUT:
***** * * * * *****

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