Sun Microsystems 2 manual Signature File Contents

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TABLE 2-3

Signature File Format Compatibility (Continued)

 

 

Format

Description

 

 

v2.1

This version extends the v2 format to indicate whether an interface is

 

inherited directly or indirectly. It is read by SignatureTest

 

command in SigTest tool 1.3 and later.

v3.1

Generates data for JDK software version 5.0 such as generics,

 

annotations, and enums.

v4.0

Inherited members are not written to the signature file. Private and

 

default visibility fields and nested classes that can potentially hide

visible API elements are tracked. In SigTest tool 1.5, all output files are of this version.

Also see “Source and Binary Compatibility Modes” on page 4.

Signature File Contents

Setup generates each signature file with a mandatory header in the first two lines, followed by the body of the signature file.

Note – Comment lines start with the pound (#) character and can be inserted anywhere after the first two mandatory header lines.

Signature File Header

Setup generates the first two mandatory header lines of each signature file as follows:

#Signature file format

#Version version-string

With the following variable replacement values:

format is either one of the values described in TABLE 2-3, or empty, that indicates v0.

version-stringis a value taken directly from the argument given at the startup command line to the -apiVersionoption (see TABLE 2-2).

Chapter 2 Using the Signature Test Tool

17

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Sun Microsystems 2 manual Signature File Contents

2 specifications

Sun Microsystems, founded in 1982, was a significant player in the computing industry, best known for its innovative technology solutions and workstations, particularly the Sun-4, which represented a key milestone in the company's history. The Sun-4 architecture, launched in 1987, utilized the SPARC (Scalable Processor Architecture) RISC processor, notable for its high performance and scalability.

One of the primary features of Sun Microsystems' platforms was their ability to efficiently handle multitasking and resource management, making them ideal for enterprise-level applications and development environments. Sun-4 workstations boasted impressive graphics capabilities with the addition of advanced graphical user interfaces, support for color displays, and the SUNVIEW windowing system, which enhanced user experience and productivity.

The Sun-4 systems also supported the SunOS operating system, which was based on UNIX. This operating system was engineered for stability and robustness, offering features like multiuser support, networked environments, and advanced security options. Moreover, SunOS provided seamless integration with various programming languages, including C and C++, facilitating software development that aligned with industry standards.

Another standout characteristic of Sun Microsystems was its commitment to open systems and standards. By providing developers with comprehensive tools and environments, such as the Standardized Application Programming Interface (API) and support for networking protocols, Sun facilitated interoperability among different computing platforms. The emphasis on open architecture also meant that customers could easily upgrade their systems without being locked into proprietary solutions.

Sun Microsystems was also ahead of its time with innovations in network computing. Their workstations were among the first to support network file systems and distributed computing concepts, enabling seamless data sharing across multiple systems. With the introduction of the Network File System (NFS), Sun revolutionized how data was accessed and managed across networks, which played a significant role in the evolving landscape of client-server computing.

In summary, the Sun Microsystems 2 and its successive innovations in workstation technology highlighted the company's forward-thinking approach. By integrating powerful performance with open systems, robust operating systems, and advanced networking capabilities, Sun laid the groundwork for modern computing, influencing various sectors from academia to enterprise solutions. Even after its acquisition by Oracle in 2010, the legacy of Sun Microsystems continues to be felt across the computing industry.