Find Second Largest Number

public class SecondLargestNumber{

public static void main(String[] args) {

int secondlargest= -1;

int largest = -1;

int num[] ={5,7,6,1,9,20};

for (int i=0;i < num.length;i++){

if(largest < num[i] ){

secondlargest = largest;

largest = num[i];

}

if(secondlargest < num[i] && largest != num[i] )

secondlargest = num[i];

}

System.out.println("Second Largest number is: "+secondlargest);

}

}