Created
February 22, 2021 12:45
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Tabular printing using Java
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| import java.util.Arrays; | |
| /** | |
| * | |
| * @author karti | |
| */ | |
| public class Table { | |
| public static int tableWidth = 100; | |
| public static void printColumns(String[] cols, int[] lengths) { | |
| int ctr = 0; | |
| printLine(lengths); | |
| printTabular(new String[][] { cols }, lengths); | |
| printLine(lengths); | |
| } | |
| public static void printLine(int[] lengths) { | |
| System.out.print("+"); | |
| for (int l : lengths) { | |
| System.out.print(fill(l, '-')); | |
| System.out.print("+"); | |
| } | |
| System.out.println(); | |
| } | |
| public static void printTabular(String[][] data, int[] lengths) { | |
| // get a row | |
| for (String[] row : data) { | |
| int lineCtr = 0; | |
| String[][] wrappedLines = new String[row.length][]; | |
| int ctr = 0; | |
| for (String cell : row) { | |
| String[] wrapped = wrap(cell, lengths[ctr++]); | |
| wrappedLines[lineCtr++] = wrapped; | |
| } | |
| int max = 0; | |
| for (String[] wcells : wrappedLines) { | |
| max = Math.max(max, wcells.length); | |
| } | |
| for (int i = 0; i < max; i++) { | |
| int cctr = 0; | |
| System.out.print("|"); | |
| for (String[] wcells : wrappedLines) { | |
| if (i < wcells.length) | |
| System.out.print(pad(wcells[i], lengths[cctr])); | |
| else | |
| System.out.print(fill(lengths[cctr])); | |
| cctr++; | |
| System.out.print("|"); | |
| } | |
| System.out.println(); | |
| } | |
| } | |
| // get wrapped arr for all the cells | |
| // get max length | |
| // write cascading line from all the cells | |
| } | |
| public static String pad(String s, int l) { | |
| if (l == s.length()) return s; | |
| char[] c = s.toCharArray(); | |
| c = Arrays.copyOf(c, l); | |
| Arrays.fill(c, s.length(), l - 1, ' '); | |
| return new String(c); | |
| } | |
| public static String fill(int l) { | |
| return fill(l, ' '); | |
| } | |
| public static String fill(int l, char f) { | |
| char[] c = new char[l]; | |
| Arrays.fill(c, f); | |
| return new String(c); | |
| } | |
| public static String[] wrap(String line, int length) { | |
| int c = line.length() / length | |
| + ((line.length() % length) > 0 ? 1 : 0); | |
| if (c == 0) return new String[] { line }; | |
| String[] lines = new String[c]; | |
| for (int i = 0; i < c; i++) { | |
| if ((i + 1) * length > line.length()) { | |
| lines[i] = line.substring(i * length); | |
| break; | |
| } | |
| lines[i] = line.substring(i * length, ((i + 1) * length)); | |
| } | |
| return lines; | |
| } | |
| } |
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