test1.java

package kz.xavescor;

import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        ArrayList<ArrayList<String>> table = new ArrayList<>();

        while (in.hasNextLine()) {
            ArrayList<String> row = new ArrayList<>();
            row.addAll(Arrays.asList(in.nextLine().split("\\|")));
            for (int i = 0; i < row.size(); ++i) {
                row.set(i, row.get(i).trim());
            }
            table.add(row);
        }

        ArrayList<Integer> maxLen = new ArrayList<>(table.get(0).size());
        for (int i = 0; i < table.get(0).size(); ++i) {
            maxLen.add(0);
        }

        for (ArrayList<String> str : table) {
            for (int col = 1; col < str.size(); ++col) {
                maxLen.set(col, Math.max(
                        maxLen.get(col), str.get(col).length()
                ));
            }
        }

        for (ArrayList<String> str : table) {
            System.out.print('|');
            for (int col = 1; col < str.size(); ++col) { //because first element is empty
                System.out.print(normalize(str.get(col), maxLen.get(col)) + '|');
            }
            System.out.println();
        }
    }

    private static String normalize(String s, Integer integer) {
        int spacesNeeded = (integer - s.length()) / 2;
        String before = new String(new char[spacesNeeded]).replace("\0", " ");
        String after = before;
        if (spacesNeeded % 2 == 1) {
            after += " ";
        }
        return before + s + after;
    }
}