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Easy Learn Java: Programming Articles, Examples and Tips - Page 348


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MirrorJNDI version 1.0 is released.

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MirrorJNDI is an open source (GPL) Java Naming and Directory Interface (JNDI) service provider for accessing arbitrary Java objects in a hierarchical namespace. MirrorJNDI can store all it's data in XML or binary serialized form. It allows to create full copy of existing service provider's data, serialize it and then work with local copy. It can be especially useful for testing interaction of your application with any JNDI service provider because you do not worry about possible loss of original data - you will delete, add or modify data in the local copy. You can also use MirrorJNDI to get started with Java Naming and Directory Interface.
MirrorJNDI home page and download.

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Posted by Anonymous on Saturday, April 23, 2005 (00:00:00) (2446 reads)

Java: Sliders

Go to all tips in Swing, AWT

Introduction

A slider (JSlider class) lets the user easily select from a range of integer values. Use sliders for integer input whenever you can. They are easier for the user than text fields, and there is no possibility of illegal input values, so your programming is simpler.

Constructors

The usual constructor is
   JSlider s = new JSlider(orientation, min, max, initial);
  • orientation: JSlider.HORIZONTAL or JSlider.VERTICAL
  • min: The minimum value.
  • max: The maximum value.
  • initial: The initial value.
Example:
JSlider sl = new JSlider(JSlider.HORIZONTAL, 0, 20, 10);

Tick Marks

You can add both major and minor tick marks. You must call setPaintTicks(true) to make the tick marks appear. Here is an example that sets major tick marks every 10 values and minor tick marks every 1 value:
   sl.setMajorTickSpacing(10); // sets numbers for biggest tick marks
   sl.setMinorTickSpacing(1);  // smaller tick marks
   sl.setPaintTicks(true);     // display the ticks

Labels

To display the values next to the major tick marks:
   sl.setPaintLabels(true);

Listeners and getting the slider value

See Change Listener to see how to do something when the slider is changed.

Advanced Appearance

In addition to tick marks, you can specify text or icon labels at any values that you specify using setLabelTable(...). You can also specify which end of the slider should have the high or low values using setInverted(true/false).

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Posted by jalex on Friday, April 22, 2005 (00:00:00) (3689 reads)

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