ICU User Guide

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The software internationalization development process uses libraries (such as the International Components for Unicode (ICU) libraries), to enable one single program to work with text in any language for any place in the world. For example, instead of having separate software versions for ten different countries, the ICU services can create one version that works seamlessly and transparently in all of them.

ICU for Java (ICU4J) includes enhanced versions of some of these classes, plus additional classes that complement the classes in the JDK. C and C++ versions of the same international functionality are available in ICU for C (ICU4C). The APIs differ slightly due to language differences and new functionality. For example, ICU4C includes a character converter API.

From the source code repository, for the latest development versions.

Download ICU in one of the following ways:

Internationalized software results in an increase in:

After downloading, see the included README file for information on what is included, building, installing, etc.

From the down load page, for packaged stable releases of ICU.

ICU was originally developed by the Taligent company. The Taligent team later became the Unicode group at the IBM® Globalization Center of Competency in Cupertino. The team has received significant input from the open source community worldwide.

The ICU services deliver proven value by lowering the cost required to integrate with disparate applications, systems and data sources on a regional and global scale. It provides value to a companys IT investment by lowering IT complexity, risk, maintenance costs and training costs. It also enhances organizational flexibility, leverages

The business case needed to justify the investment in software internationalization is compelling when the investment is amortized over a number of projects. In the fast-paced and rapidly-evolving world of traditional and evolving e-businesses, these international components provide a firm ground on which companies, partners and suppliers can build their business transactions. They can share competitive information to help gain a significant economic advantage.

existing assets, and improves planning and decision-making. It enables organizational learning, process-driven synchronization, event-driven evaluation and decision-making.

As companies integrate e-commerce on a global scale into their fundamental business processes, their prospective customers, established customers, and active partners can take advantage of increased revenue and decreased expenses through software internationalization. They also can improve customer communications and increase savings.

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ICU4J and ICU4C keep the same development goals. They both track additions to the Java internationalization APIs and implement the latest released Unicode standard. They also maintain a single, portable source code base.

Java™ classes developed at Taligent were incorporated into the Java Development Kit (JDK) 1.1 developed by Sun® Microsystems. The classes were then ported to C++ and later some classes were also ported to C. The classes provide internationalization utilities for writing global applications in C, C++, or Java programming languages.

Companies need to establish a better linkage between their global business processes and the underlying supportive IT processes. If they want to deliver this new flexibility and agility, they must depend on the software internationalization process.

In todays business climate of globalization, companies must compete in a new Internet-enabled business climate of constant change and compressed time frames. Their customers expect reliable service and support.

The ICU components are an integral part of software development because they hide the cultural nuances and technical complexities of locale-specific software requirements. These complexities provide critical functionality for applications, but the application developer does not need to exert a huge effort or incur high costs to build them.

All of us in the ICU and open source group appreciate the time you are taking to understand our technology. We have put our best collective effort into these open components, and look forward to your questions, comments and suggestions.

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