Multithreading of Java

Applications today require a high degree of parallelism. Even a very single- minded application can have a complex user interface—which requires concurrent activities. As machines get faster, users become more sensitive to waiting for unrelated tasks that seize control of their time. Threads provide efficient multiprocessing and distribution of tasks for both client and server applications. Java makes threads easy to use because support for them is built into the language. Concurrency is nice, but there’s more to programming with threads than just performing multiple tasks simultaneously. In many cases, threads need to be synchronized, which can be tricky without explicit language support. Java supports synchronization based on the monitor and condition model developed by C.A.R. Hoare—a sort of lock and key system for accessing resources. The keyword
synchronized designates methods for safe, serialized access within an object. Only one synchronized method within the object may run at a given time. There are also simple, primitive methods for explicit waiting and signaling between threads interested in the same object. Learning to program with threads is an important part of learning to program in Java. See Chapter 8, for a discussion of this topic.

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Keys to Financial Success

Although making resolutions to improve your financial situation is a good thing to do at any time of year, many people find it easier at the beginning of a new year. Regardless of when you begin, the basics remain the same. Here are my top ten keys to getting ahead financially.

1. Get Paid What You’re Worth and Spend Less Than You Earn

It sounds simplistic, but many people struggle with this first basic rule. Make sure you know what your job is worth in the marketplace, by conducting an evaluation of your skills, productivity, job tasks, contribution to the company, and the going rate, both inside and outside the company, for what you do. Being underpaid even a thousand dollars a year can have a significant cumulative effect over the course of your working life.

2. Stick to a Budget

One of my favorite subjects: budgeting. It’s not a four-letter word. How can you know where your money is going if you don’t budget? How can you set spending and saving goals if you don’t know where your money is going? You need a budget whether you make thousands or hundreds of thousands of dollars a year.

3. Pay Off Credit Card Debt

Credit card debt is the number one obstacle to getting ahead financially. Those little pieces of plastic are so easy to use, and it’s so easy to forget that it’s real money we’re dealing with when we whip them out to pay for a purchase, large or small. Despite our good resolves to pay the balance off quickly, the reality is that we often don’t, and end up paying far more for things than we would have paid if we had used cash.

4. Have a Savings Plan

You’ve heard it before: Pay yourself first! If you wait until you’ve met all your other financial obligations before seeing what’s left over for saving, chances are you’ll never have a healthy savings account or investments. Resolve to set aside a minimum of 5% to 10% of your salary for savings BEFORE you start paying your bills. Better yet, have money automatically deducted from your paycheck and deposited into a separate account.

5. Invest!

If you’re contributing to a retirement plan and a savings account and you can still manage to put some money into other investments, all the better.

6. Review Your Insurance Coverages

Too many people are talked into paying too much for life and disability insurance, whether it’s by adding these coverages to car loans, buying whole-life insurance policies when term-life makes more sense, or buying life insurance when you have no dependents. On the other hand, it’s important that you have enough insurance to protect your dependents and your income in the case of death or disability.

How Cloud Computing Is Changing the World

Some analysts say cloud computing represents a sea change in the way computing is done in corporations. Merrill Lynch  estimates that within the next five years, the annual global market for cloud computing will surge to $95 billion. In a May 2008 report, Merrill Lynch estimated that 12% of the worldwide software market would go to the cloud in that period.

At first, just a handful of employees at Sanmina-SCI began using Google Apps for tasks like e-mail, document creation, and appointment scheduling. Now, just six months later, almost 1,000 employees of the electronics manufacturing company go online to use Google Apps in place of the comparable Microsoft  tools. “We have project teams working on a global basis and to help them collaborate effectively, we use Google Apps,” says Manesh Patel, chief information officer of Sanmina-SCI, a company with $10.7 billion in annual revenue. In the next three years, the number of Google Apps users may rise to 10,000, or about 25% of the total, Patel estimates.

Based Sanmina and Google are at the forefront of a fundamental shift in the way companies obtain software and computing capacity. A host of providers including Amazon, Salesforce.com, IBM, Oracle, and Microsoft are helping corporate clients use the Internet to tap into everything from extra server space to software that helps manage customer relationships. Assigning these computing tasks to some remote location—rather than, say, a desktop computer, handheld machine, or a company’s own servers—is referred to collectively as cloud computing, and it’s catching on across Corporate America.

The term “cloud computing” encompasses many areas of tech, including software as a service, a software distribution method pioneered by Salesforce.com about a decade ago. It also includes newer avenues such as hardware as a service, a way to order storage and server capacity on demand from Amazon and others. What all these cloud computing services have in common, though, is that they’re all delivered over the Internet, on demand, from massive data centers.