How to "Open" and "Save" using java

I want to make an "Open" and "Save" dialog in java. An example of what I want is in the images below:

Open:

Save:

How would I go about doing this?

You want to use a JFileChooser object. It will open and be modal, and block in the thread that opened it until you choose a file.

Open:

JFileChooser fileChooser = new JFileChooser();
if (fileChooser.showOpenDialog(modalToComponent) == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
// load from file
}

Save:

JFileChooser fileChooser = new JFileChooser();
if (fileChooser.showSaveDialog(modalToComponent) == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
// save to file
}

There are more options you can set to set the file name extension filter, or the current directory. See the API for the javax.swing.JFileChooser for details. There is also a page for "How to Use File Choosers" on Oracle's site:

http://download.oracle.com/javase/tutorial/uiswing/components/filechooser.html

I would suggest looking into javax.swing.JFileChooser

Here is a site with some examples in using as both 'Open' and 'Save'. http://www.java2s.com/Code/Java/Swing-JFC/DemonstrationofFiledialogboxes.htm

This will be much less work than implementing for yourself.

Maybe you could take a look at JFileChooser, which allow you to use native dialogs in one line of code.

You can find an introduction to file dialogs in the Java Tutorials. Java2s also has some example code.

First off, you'll want to go through Oracle's tutorial to learn how to do basic I/O in Java.

After that, you will want to look at the tutorial on how to use a file chooser.

You may also want to consider the possibility of using SWT (another Java GUI library). Pros and cons of each are listed at:

https://stackoverflow.com/questions/2306190/java-desktop-application-swt-vs-swing/2306275#2306275