# How to sort in JTable?

## How to sort in JTable?

We can sort a JTable in a particular column by using the method setAutoCreateRowSorter() and set to true of JTable class.

**How do I sort JTable in ascending order?**

Sorting JTable by multiple columns sortKeys. add( new RowSorter. SortKey(columnIndexForJob, SortOrder. ASCENDING));

**How to sort the column in java?**

Sort 2D Array in Java

- Use java.util.Arrays.sort(T[] a, Comparator c) to Sort a 2D Array Given Column Wise.
- Use java.util.Arrays.sort(T[] a) to Sort 2D Array Row-Wise.

### What is JTable in Java Swing?

The JTable class is a part of Java Swing Package and is generally used to display or edit two-dimensional data that is having both rows and columns. It is similar to a spreadsheet. This arranges data in a tabular form.

**How do I sort a 2D array column wise?**

Approach: Follow the steps below to solve the problem:

- Traverse the matrix.
- Find the transpose of the given matrix mat[][].
- Store this transpose of mat[][] in a 2D vector, tr[][]
- Traverse the rows of the matrix tr[][]
- Sort each row of the matrix using the sort function.
- Store the transpose of tr[][] in mat[][]

**How fetch data from database to JTable in Java?**

DefaultTableModel model = new DefaultTableModel(new String[]{“Class Name”, “Home work”, “Due Date”}, 0); Load the data from the database… String sql=”SELECT * FROM hwList”; ResultSet rs = st. executeQuery(sql);

#### How do you sort a 2D array?

Make the 2D array into a separate simple (1D) array (STEP 1). Then use the Arrays. sort() method to sort the simple array (STEP 2). Then set each space of the 2D array to be the number of columns across (X-coordinate where the space will be changed) multiplied by the number of spaces per row in the 2D array.

**How do you sort an ArrayList?**

An ArrayList can be sorted by using the sort() method of the Collections class in Java. It accepts an object of ArrayList as a parameter to be sort and returns an ArrayList sorted in the ascending order according to the natural ordering of its elements.

**What is JTree function?**

Tree-Related Classes and Interfaces

Class or Interface | Purpose |
---|---|

JTree | The component that presents the tree to the user. |

TreePath | Represents a path to a node. |

## How do I sort column wise?

Given a n x n matrix. The problem is to sort the matrix row-wise and column wise….Approach: Following are the steps:

- Sort each row of the matrix.
- Get transpose of the matrix.
- Again sort each row of the matrix.
- Again get transpose of the matrix.

**How do you sort a column wise Matrix?**

**How do you sort a table in JTable?**

Using external Comparator to sort a specific column in JTable. By default, the TableRowSorter does the sorting by comparing values returned from compareTo() method of the object whose type is identified by the column class returned by TableModel.getColumnClass() method in the table model class.

### How can I reverse the Order of rows in JTable?

You also can trigger row sorting by calling toggleSortOrder () on the RowSorter of your JTable: Reverses the sort order of the specified column. Typically this will reverse the sort order from ascending to descending (or descending to ascending) if the specified column is already the primary sorted column.

**How to enable row sorting in JTable in NetBeans?**

(1). Static way to Enable Row Sorting of jTable in Java : If you want to enable row sorting during design time. And sort it during run time then it can be done by two ways: In NetBeans, you can just go to jTable’s “Properties” window, and find “autoCreateRowSorter” option from it.

**How does JTable work with tablerowsorter in Java?**

This will do all the wiring such that when the user does the appropriate gesture, such as clicking on the column header, the table will visually sort. JTable ‘s row-based methods and JTable ‘s selection model refer to the view and not the underlying model.