RGB – It is a color combination value of Red Green Blue

Syntax: 0xRRGGBB

Example: -

0xFF0000 (or) 255, 0, 0 (Red color)

0x00FF00 (or) 0, 255, 0 (Green color)

0x0000FF (or) 0, 0, 255 (Blue color)

Red – the red component of the color being set in range 0-255

Green – the green component of the color being set in range 0-255

Blue – the blue component of the color being set in range 0-255

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ARGB – It is a color combination value of Red Green Blue with Alpha channel

Syntax: 0xAARRGGBB

Example: -

0xFFFF0000 – Red color with white color background

0x00FF0000 – Red color with transparent background

Alpha – it specifies the opacity (transparency) of the pixel

[0x00 – Fully transparent and 0xFF – white background]

Red – the red component of the color being set in range 0-255

Green – the green component of the color being set in range 0-255

Blue – the blue component of the color being set in range 0-255

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Convert RGB to ARGB

public int convert_RGB_to_ARGB(int rgb) {

int r = (rgb >> 16) & 0xFF;

int g = (rgb >> 8) & 0xFF;

int b = (rgb >> 0) & 0xFF;

return 0xff000000 | (r << 16) | (g << 8) | b;

}

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Convert ARGB to RGB

public int convert_ARGB_to_RGB(int argb) {

int a = (argb >> 24) & 0xFF;

int r = (argb >> 16) & 0xFF;

int g = (argb >> 8) & 0xFF;

int b = (argb >> 0) & 0xFF;

return (r << 16) | (g << 8) | b;

}

Profiles:-

Optional Packages:-

JavaME is a reduced version of the Java API and Java Virtual Machine that is designed to operate within the limited resources available in the embedded computers and microcomputers. So this JVM will be called as KVM [KVM- KJava (Kilobytes) Virtual Machine]

This technology is not only present in Mobile Phones but also in Pagers, PDAs & other consumer electronics devices like washing machine, Set top boxes, Car Navigation systems etc.,

J2ME is compatibility with all Java-enabled devices (Mostly in GSM phones). Blackberry, Motorola, Nokia, Samsung, LG, Sagem, SonyEricsson, Panasonic, HTC, Alcatel, Sharp, Siemens, BenQ- Siemens, NEC & etc.