Output in a table format in Java's System.out
JavaString FormattingTabularJava Problem Overview
I'm getting results from a database and want to output the data as a table in Java's standard output
I've tried using \t but the first column I want is very variable in length.
Is there a way to display this in a nice table like output?
Java Solutions
Solution 1 - Java
Use [System.out.format][1] . You can set lengths of fields like this:
System.out.format("%32s%10d%16s", string1, int1, string2);
This pads string1, int1, and string2 to 32, 10, and 16 characters, respectively.
See the Javadocs for [java.util.Formatter][2] for more information on the syntax (System.out.format uses a Formatter internally).
[1]: http://java.sun.com/javase/6/docs/api/java/io/PrintWriter.html#format(java.lang.String,%20java.lang.Object...) "format(String, Object...)" [2]: http://java.sun.com/javase/6/docs/api/java/util/Formatter.html
Solution 2 - Java
Using j-text-utils you may print to console a table like:
And it as simple as:
TextTable tt = new TextTable(columnNames, data);
tt.printTable();
The API also allows sorting and row numbering ...
Solution 3 - Java
I've created a project that can build much advanced table views. If you supposed to print the table, the width of the table going to have a limit. I have applied it in one of my own project to get a customer invoice print. Following is an example of the print view.
PLATINUM COMPUTERS(PVT) LTD
NO 20/B, Main Street, Kandy, Sri Lanka.
Land: 812254630 Mob: 712205220 Fax: 812254639
CUSTOMER INVOICE
+-----------------------+----------------------+
|INFO |CUSTOMER |
+-----------------------+----------------------+
|DATE: 2015-9-8 |ModernTec Distributors|
|TIME: 10:53:AM |MOB: +94719530398 |
|BILL NO: 12 |ADDRES: No 25, Main St|
|INVOICE NO: 458-80-108 |reet, Kandy. |
+-----------------------+----------------------+
| SELLING DETAILS |
+-----------------+---------+-----+------------+
|ITEM | PRICE($)| QTY| VALUE|
+-----------------+---------+-----+------------+
|Optical mouse | 120.00| 20| 2400.00|
|Gaming keyboard | 550.00| 30| 16500.00|
|320GB SATA HDD | 220.00| 32| 7040.00|
|500GB SATA HDD | 274.00| 13| 3562.00|
|1TB SATA HDD | 437.00| 11| 4807.00|
|RE-DVD ROM | 144.00| 29| 4176.00|
|DDR3 4GB RAM | 143.00| 13| 1859.00|
|Blu-ray DVD | 94.00| 28| 2632.00|
|WR-DVD | 122.00| 34| 4148.00|
|Adapter | 543.00| 28| 15204.00|
+-----------------+---------+-----+------------+
| RETURNING DETAILS |
+-----------------+---------+-----+------------+
|ITEM | PRICE($)| QTY| VALUE|
+-----------------+---------+-----+------------+
|320GB SATA HDD | 220.00| 4| 880.00|
|WR-DVD | 122.00| 7| 854.00|
|1TB SATA HDD | 437.00| 7| 3059.00|
|RE-DVD ROM | 144.00| 4| 576.00|
|Gaming keyboard | 550.00| 6| 3300.00|
|DDR3 4GB RAM | 143.00| 7| 1001.00|
+-----------------+---------+-----+------------+
GROSS 59,928.00
DISCOUNT(5%) 2,996.40
RETURN 9,670.00
PAYABLE 47,261.60
CASH 20,000.00
CHEQUE 15,000.00
CREDIT(BALANCE) 12,261.60
--------------------- ---------------------
CASH COLLECTOR GOODS RECEIVED BY
soulution by clough.com
This is the code for above print view and you can find the library (Wagu) in here.
Solution 4 - Java
I may be very late for the Answer but here a simple and generic solution
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;
public class TableGenerator {
private int PADDING_SIZE = 2;
private String NEW_LINE = "\n";
private String TABLE_JOINT_SYMBOL = "+";
private String TABLE_V_SPLIT_SYMBOL = "|";
private String TABLE_H_SPLIT_SYMBOL = "-";
public String generateTable(List<String> headersList, List<List<String>> rowsList,int... overRiddenHeaderHeight)
{
StringBuilder stringBuilder = new StringBuilder();
int rowHeight = overRiddenHeaderHeight.length > 0 ? overRiddenHeaderHeight[0] : 1;
Map<Integer,Integer> columnMaxWidthMapping = getMaximumWidhtofTable(headersList, rowsList);
stringBuilder.append(NEW_LINE);
stringBuilder.append(NEW_LINE);
createRowLine(stringBuilder, headersList.size(), columnMaxWidthMapping);
stringBuilder.append(NEW_LINE);
for (int headerIndex = 0; headerIndex < headersList.size(); headerIndex++) {
fillCell(stringBuilder, headersList.get(headerIndex), headerIndex, columnMaxWidthMapping);
}
stringBuilder.append(NEW_LINE);
createRowLine(stringBuilder, headersList.size(), columnMaxWidthMapping);
for (List<String> row : rowsList) {
for (int i = 0; i < rowHeight; i++) {
stringBuilder.append(NEW_LINE);
}
for (int cellIndex = 0; cellIndex < row.size(); cellIndex++) {
fillCell(stringBuilder, row.get(cellIndex), cellIndex, columnMaxWidthMapping);
}
}
stringBuilder.append(NEW_LINE);
createRowLine(stringBuilder, headersList.size(), columnMaxWidthMapping);
stringBuilder.append(NEW_LINE);
stringBuilder.append(NEW_LINE);
return stringBuilder.toString();
}
private void fillSpace(StringBuilder stringBuilder, int length)
{
for (int i = 0; i < length; i++) {
stringBuilder.append(" ");
}
}
private void createRowLine(StringBuilder stringBuilder,int headersListSize, Map<Integer,Integer> columnMaxWidthMapping)
{
for (int i = 0; i < headersListSize; i++) {
if(i == 0)
{
stringBuilder.append(TABLE_JOINT_SYMBOL);
}
for (int j = 0; j < columnMaxWidthMapping.get(i) + PADDING_SIZE * 2 ; j++) {
stringBuilder.append(TABLE_H_SPLIT_SYMBOL);
}
stringBuilder.append(TABLE_JOINT_SYMBOL);
}
}
private Map<Integer,Integer> getMaximumWidhtofTable(List<String> headersList, List<List<String>> rowsList)
{
Map<Integer,Integer> columnMaxWidthMapping = new HashMap<>();
for (int columnIndex = 0; columnIndex < headersList.size(); columnIndex++) {
columnMaxWidthMapping.put(columnIndex, 0);
}
for (int columnIndex = 0; columnIndex < headersList.size(); columnIndex++) {
if(headersList.get(columnIndex).length() > columnMaxWidthMapping.get(columnIndex))
{
columnMaxWidthMapping.put(columnIndex, headersList.get(columnIndex).length());
}
}
for (List<String> row : rowsList) {
for (int columnIndex = 0; columnIndex < row.size(); columnIndex++) {
if(row.get(columnIndex).length() > columnMaxWidthMapping.get(columnIndex))
{
columnMaxWidthMapping.put(columnIndex, row.get(columnIndex).length());
}
}
}
for (int columnIndex = 0; columnIndex < headersList.size(); columnIndex++) {
if(columnMaxWidthMapping.get(columnIndex) % 2 != 0)
{
columnMaxWidthMapping.put(columnIndex, columnMaxWidthMapping.get(columnIndex) + 1);
}
}
return columnMaxWidthMapping;
}
private int getOptimumCellPadding(int cellIndex,int datalength,Map<Integer,Integer> columnMaxWidthMapping,int cellPaddingSize)
{
if(datalength % 2 != 0)
{
datalength++;
}
if(datalength < columnMaxWidthMapping.get(cellIndex))
{
cellPaddingSize = cellPaddingSize + (columnMaxWidthMapping.get(cellIndex) - datalength) / 2;
}
return cellPaddingSize;
}
private void fillCell(StringBuilder stringBuilder,String cell,int cellIndex,Map<Integer,Integer> columnMaxWidthMapping)
{
int cellPaddingSize = getOptimumCellPadding(cellIndex, cell.length(), columnMaxWidthMapping, PADDING_SIZE);
if(cellIndex == 0)
{
stringBuilder.append(TABLE_V_SPLIT_SYMBOL);
}
fillSpace(stringBuilder, cellPaddingSize);
stringBuilder.append(cell);
if(cell.length() % 2 != 0)
{
stringBuilder.append(" ");
}
fillSpace(stringBuilder, cellPaddingSize);
stringBuilder.append(TABLE_V_SPLIT_SYMBOL);
}
public static void main(String[] args) {
TableGenerator tableGenerator = new TableGenerator();
List<String> headersList = new ArrayList<>();
headersList.add("Id");
headersList.add("F-Name");
headersList.add("L-Name");
headersList.add("Email");
List<List<String>> rowsList = new ArrayList<>();
for (int i = 0; i < 5; i++) {
List<String> row = new ArrayList<>();
row.add(UUID.randomUUID().toString());
row.add(UUID.randomUUID().toString());
row.add(UUID.randomUUID().toString());
row.add(UUID.randomUUID().toString());
rowsList.add(row);
}
System.out.println(tableGenerator.generateTable(headersList, rowsList));
}
}
With this kind of Output
+----------------------------------------+----------------------------------------+----------------------------------------+----------------------------------------+
| Id | F-Name | L-Name | Email |
+----------------------------------------+----------------------------------------+----------------------------------------+----------------------------------------+
| 70a56f25-d42a-499c-83ac-50188c45a0ac | aa04285e-c135-46e2-9f90-988bf7796cd0 | ac495ba7-d3c7-463c-8c24-9ffde67324bc | f6b5851b-41e0-4a4e-a237-74f8e0bff9ab |
| 6de181ca-919a-4425-a753-78d2de1038ef | c4ba5771-ccee-416e-aebd-ef94b07f4fa2 | 365980cb-e23a-4513-a895-77658f130135 | 69e01da1-078e-4934-afb0-5afd6ee166ac |
| f3285f33-5083-4881-a8b4-c8ae10372a6c | 46df25ed-fa0f-42a4-9181-a0528bc593f6 | d24016bf-a03f-424d-9a8f-9a7b7388fd85 | 4b976794-aac1-441e-8bd2-78f5ccbbd653 |
| ab799acb-a582-45e7-ba2f-806948967e6c | d019438d-0a75-48bc-977b-9560de4e033e | 8cb2ad11-978b-4a67-a87e-439d0a21ef99 | 2f2d9a39-9d95-4a5a-993f-ceedd5ff9953 |
| 78a68c0a-a824-42e8-b8a8-3bdd8a89e773 | 0f030c1b-2069-4c1a-bf7d-f23d1e291d2a | 7f647cb4-a22e-46d2-8c96-0c09981773b1 | 0bc944ef-c1a7-4dd1-9eef-915712035a74 |
+----------------------------------------+----------------------------------------+----------------------------------------+----------------------------------------+
Solution 5 - Java
Check this out. The author provides a simple but elegant solution which doesn't require any 3rd party library. http://www.ksmpartners.com/2013/08/nicely-formatted-tabular-output-in-java/
Solution 6 - Java
Because most of solutions is bit outdated I could also suggest asciitable which already available in maven (de.vandermeer:asciitable:0.3.2) and may produce very complicated configurations.
Features (by offsite):
- Text table with some flexibility for rules and content, alignment, format, padding, margins, and frames:
- add text, as often as required in many different formats (string, text provider, render provider, ST, clusters),
- removes all excessive white spaces (tabulators, extra blanks, combinations of carriage return and line feed),
- 6 different text alignments: left, right, centered, justified, justified last line left, justified last line right,
- flexible width, set for text and calculated in many different ways for rendering
- padding characters for left and right padding (configurable separately)
- padding characters for top and bottom padding (configurable separately)
- several options for drawing grids
- rules with different styles (as supported by the used grid theme: normal, light, strong, heavy)
- top/bottom/left/right margins outside a frame
- character conversion to generated text suitable for further process, e.g. for LaTeX and HTML
And usage still looks easy:
AsciiTable at = new AsciiTable();
at.addRule();
at.addRow("row 1 col 1", "row 1 col 2");
at.addRule();
at.addRow("row 2 col 1", "row 2 col 2");
at.addRule();
System.out.println(at.render()); // Finally, print the table to standard out.
Solution 7 - Java
public class Main {
public static void main(String args[]) {
String format = "|%1$-10s|%2$-10s|%3$-20s|\n";
System.out.format(format, "A", "AA", "AAA");
System.out.format(format, "B", "", "BBBBB");
System.out.format(format, "C", "CCCCC", "CCCCCCCC");
String ex[] = { "E", "EEEEEEEEEE", "E" };
System.out.format(String.format(format, (Object[]) ex));
}
}
differece in sizes of input doesnt effect the output
Solution 8 - Java
Check out the class java.util.Formatter.