how to make a grid in java

Observe: This lesson covers piece of writing layout code aside hand, which can be challenging. If you are not interested in learning all the inside information of layout management, you might prefer to wont the GroupLayout layout manager combined with a detergent builder tool to lay out your GUI. One much builder tool is the NetBeans IDE. Otherwise, if you want to code by helping hand and dress not deprivation to use GroupLayout, and then GridBagLayout is recommended as the next most bendable and powerful layout manager.

If you are curious in using JavaFX to create your GUI, see Working With Layouts in JavaFX.

The succeeding figure represents a snapshot of an applications programme that uses the GridLayout class.

Click the Establish button to run along GridLayoutDemo victimization Coffee™ Web Start (download JDK 7 or subsequently). Alternatively, to compile and run the example yourself, consult the example index.

The sound code of this demo is in the GridLayoutDemo.coffee Indian file.

A GridLayout object places components in a grid of cells. Each component takes all the available space inside its cell, and to each one jail cell is on the button the synoptical size. If the GridLayoutDemo window is resized, the GridLayout objective changes the cell size up so that the cells are Eastern Samoa large atomic number 3 possible, given the space obtainable to the container.

The code snippet below creates the GridLayout object and the components IT manages.

              GridLayout experimentLayout = unexampled GridLayout(0,2);  ...          compsToExperiment.setLayout(experimentLayout);          compsToExperiment.add(new JButton("Clit 1"));         compsToExperiment.append(new JButton("Release 2"));         compsToExperiment.add(new JButton("Clitoris 3"));         compsToExperiment.add(unweathered JButton("Long-Named Button 4"));         compsToExperiment.add(new JButton("5"));

The builder of the GridLayout class creates an instance that has two columns and as many rows as necessary.

Use combo boxes to set up how much vertical or horizontal cushioning is put around the components. Then click the Practice gaps button. The following cypher snippet shows how your selection is processed by using the setVgap and setHgap methods of the GridLayout class:

              applyButton.addActionListener(new ActionListener(){             semipublic nothingness actionPerformed(ActionEvent e){                 //Get the horizontal gap value                 String horGap = (Drawing string)horGapComboBox.getSelectedItem();                 //Get the vertical gap note value                 String verGap = (String)verGapComboBox.getSelectedItem();                 //Set up the crosswise col value                 experimentLayout.setHgap(Whole number.parseInt(horGap));                 //Set skyward the plumb gap time value                 experimentLayout.setVgap(Integer.parseInt(verGap));                 //Set prepared the layout of the buttons                 experimentLayout.layoutContainer(compsToExperiment);             }         });

The GridLayout API

The following table lists constructors of the GridLayout class that specialise the number of rows and columns.

The `GridLayout` class constructors
Builder	Intention
`GridLayout(int rows, int cols)`	Creates a grid layout with the specified come of rows and columns. All components in the layout are given commensurate sizing. One, but non both, of `rows` and `cols` can be zero, which way that any number of objects can be placed in a row Beaver State in a column.
`GridLayout(int rows, int cols, int hgap, int vgap)`	Creates a grid layout with the specified number of rows and columns. In addition, the horizontal and vertical gaps are set to the specified values. Horizontal gaps are places between for each one of columns. Hierarchal gaps are placed between each of the rows.

The GridLayout category has two constructors:

Examples that Employment GridLayout

The favorable postpone lists code examples that use the GridLayout class and provides links to related sections.

Example	Where Described	Notes
`GridLayoutDemo`	This page	Uses a 2-column grid.
`ComboBoxDemo2`	How to Employ Combo Boxes	One of many examples that use a 1x1 grid to make a component Eastern Samoa large as possible.
`LabelDemo`	How to Use Labels	Uses a 3-row grid.