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How to clear the cache in NetBeans

Close NetBeans before deleting the cache. NetBeans 7.2+, Windows 7 Cache is located in C:\Users\<username>\AppData\Local\NetBeans\Cache\. Clear the cache using the %USERPROFILE% Windows variable: del /s /q %USERPROFILE%\AppData\Local\NetBeans\Cache\ If it is set, you can also use the environment variable %LOCALAPPDATA%: del /s /q %LOCALAPPDATA%\NetBeans\Cache\ NetBeans 7.2+, Linux Cache is at: ~/.cache/netbeans/${netbeans_version}/index/ Mac OS X Cache is … Read more

How to add a JAR in NetBeans

Right click ‘libraries’ in the project list, then click add.

Centering a JLabel on a JPanel

Here are four ways to center a component: import java.awt.*; import javax.swing.*; import javax.swing.border.*; class CenterComponent { public static JLabel getLabel(String text) { return getLabel(text, SwingConstants.LEFT); } public static JLabel getLabel(String text, int alignment) { JLabel l = new JLabel(text, alignment); l.setBorder(new LineBorder(Color.RED, 2)); return l; } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() … Read more

Java Swing button colors [duplicate]

Here is a question and several answers related to flashing a component. Addendum: You can learn more in the article How to Use Buttons. In particular, you can use setForeground() to change the color of a button’s text, but the corresponding setBackground() doesn’t read well on some platforms. Using a Border is one alternative; a … Read more

How do I set the classpath in NetBeans?

Right-click your Project. Select Properties. On the left-hand side click Libraries. Under Compile tab – click Add Jar/Folder button. Or Expand your Project. Right-click Libraries. Select Add Jar/Folder.

Netbeans GUI editor generating its own incomprehensible code

You may have inadvertently selected Java Desktop Application Creates a skeleton of a desktop application based on the Swing Application Framework (JSR 296). This template provides basic application infrastructure such as a menu bar, persisting of window state, and status bar. With this template, you can also generate code to create a GUI interface for … Read more

How to open a Project in NetBeans

When you clean and build under Netbeans, you should find all you need under the dist folder: if you a creating a web application you should find a .war file – that is the file to deploy: just copy it to the webapps folder for Tomcat if you are creating a standalone application or a … Read more

Java and NetBeans: Cannot run code from the compiled file

Try exporting the jar file and use JWrapper to build an executable. This will make it easier than using a console to run your project.

How to use output from a splited sms [closed]

You will need to define the rules for how to translate the input into an action on the database. To get you started, you can write if statements like this for each rule: if (a.length == 3 && a[0] == “pay” && a[1] == “merchant”) { double amount = Double.parseDouble(a[2]); // connect to database and … Read more

How can i change my Var to Float in GUI Java?

You can use: float input1String = txtInput1.getText() == null ? 0.0f : Float.valueOf(txtInput1.getText().trim()); which can throw an exception if the value of yout Textfiled is not a float value