Java - Two Max number in array

package programs;

public class TwoMaxNumbersInArray {


public void twoMaxNumbersInArray(int[] a){
int firstBigNumber = 0;
int secondBigNumber = 0;

for(int num:a){

if(firstBigNumber < num){
secondBigNumber = firstBigNumber;
firstBigNumber = num;
System.out.println("secondBigNumber:-"+secondBigNumber);
System.out.println("firstBigNumber:-"+firstBigNumber);
System.out.println("-------");

}
else if(secondBigNumber < num){
secondBigNumber = num;

System.out.println("secondBigNumber:-"+secondBigNumber);
System.out.println("*******");
}
}

System.out.println("firstBigNumber is:-"+firstBigNumber);
System.out.println("secondBigNumber is:-"+secondBigNumber);

}

    public static void main(String a[]){
        int num[] = {5,34,78,2,45,1,99,23};
        TwoMaxNumbersInArray obj = new TwoMaxNumbersInArray();
        obj.twoMaxNumbersInArray(num);
     
    }

}