Question

I have some problem to compare values from different array list
From this values, I need to compare and find the max n min

Here is my coding:

    ArrayList<Integer> S1 = new ArrayList<Integer>(5);  
    ArrayList<Integer> S2 = new ArrayList<Integer>(5);  
    ArrayList<Integer> S3 = new ArrayList<Integer>(5);  

    S1.add(49);S1.add(68);S1.add(91);S1.add(91);S1.add(12);  
    S2.add(85);S2.add(56);S2.add(62);S2.add(72);S2.add(94);  
    S3.add(76);S3.add(28);S3.add(52);S3.add(96);S3.add(70);

Example: i want to compare 49,85,76

Answer 1

Firstly, you can add elements in a list easily by

 ArrayList<Integer> s1 = new ArrayList<Integer>(5);  
 s1.addAll(Arrays.asList(49, 68, 91, 12));

Furthermore, avoid using capitals for variable names, these are reserved for class names.

Now, to answer your question. This can be done using a simple loop:

ArrayList<Integer> min = new ArrayList<Integer>(5);  
ArrayList<Integer> max = new ArrayList<Integer>(5);  

// ASSUMPTION: s1, s2 and s3 has the same length, or at least s1.length is the 
// shortest list
for (int i = 0; i < s1.length; i++) {
  max.add(Math.max(Math.max(s1.get(i), s2.get(i)), s3,get(i)));
  min.add(Math.min(Math.min(s1.get(i), s2.get(i)), s3,get(i)));
}

You’ll end up with two arrays. Each containing the minimum or maximum for a particular index value. I hope this is what you wanted.