Java Program to Create a Transparent Cursor

This is a Java Program to Create a Transparent Cursor

Problem Description

We have to write a program in Java such that it creates an applet in which the cursor behaves as a transparent cursor inside an area.

Expected Input and Output

For creating a transparent cursor, we can have the following set of input and output.

To View the Transparent Cursor :

When the cursor is moved inside the text area,
it is expected that the cursor becomes transparent.

Problem Solution

1. Create a object of class Toolkit and get the default system toolkit.
2. Create an object of class Image for the cursor image. For a transparent cursor the image path is empty.
3. Create an object of class Point.
4. Create a cursor using the createCustomCursor method of the Cursor class.
5. Create a text area and add the cursor to the area.

Program/Source Code

Here is source code of the Java Program to create a transparent cursor. The program is successfully compiled and tested using javac compiler on Fedora 30. The program output is also shown below.

/* Java Program to Create a Transparent Cursor using an Applet */

```
import java.applet.*;
```
```
import java.awt.*;
```
```
public class My_Cursor extends Applet
```
```
{
```

    //Function to create a transparent cursor

```
    public void init()
```
```
    {
```
```
	setBackground(Color.white);
```
```
	setLayout(null);
```
```
	//Create a transparent cursor
```

	Toolkit t = Toolkit.getDefaultToolkit();

```
	Image img = t.getImage("");
```
```
	Point p = new Point(0,0);
```

	Cursor c = t.createCustomCursor(img,p,"my_cursor");

	//Create a area when the cursor is transparent

```
	TextArea area = new TextArea();
```
```
	area.setBackground(Color.green);
```
```
	area.setBounds(100,100,300,300);
```
```
	this.add(area);
```
```
	//Set transparent cursor to the area
```
```
	area.setCursor(c);
```
```
    }
```
```
}
```
```
/*
```

<applet code = My_Cursor.class width = 500 height = 500>

```
</applet>
```
```
*/
```

To compile an execute the program use the following commands :

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>>>javac My_Cursor.java
>>>appletviewer My_Cursor.java

Program Explanation

1. The method createCustomCursor(Cursor Image, Point Hotspot, Cursor Name) is used to create a cursor.
2. To set the cursor to a component use setCursor(Cursor) method.

Runtime Test Cases

Here’s the run time test cases for creating a custom cursor for different input cases.

Test case 1 – When the cursor is outside the text area :