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Chapter 3 Control Methods
Chapter 3 Control Methods

... To generate random numbers using the Math.random() method (§3.9). To combine conditions using logical operators (&&, ||, and !) (§3.12). To program using selection statements with combined conditions (LeapYear, Lottery) (§§3.13-3.14). To implement selection control using switch statements (§3.15). T ...
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... All data and programs are ultimately just zeros and ones » each digit can have one of two values, hence binary » bit is one binary digit » byte is a group of eight bits Text files: the bits represent printable characters » one byte per character for ASCII, the most common code » for example, Java so ...
Savitch Java Ch. 9 - University of Scranton: Computing Sciences Dept.
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... Binary files: the bits represent other types of encoded information, such as executable instructions or numeric data » these files are easily read by the computer but not humans » they are not "printable" files – actually, you can print them, but they will be unintelligible – "printable" means "easi ...
Kennesaw State University: AP Computer Science A
Kennesaw State University: AP Computer Science A

... This course is a 36-week, 4 classroom hours per week course for students taking the College Board’s Advanced Placement Computer Science A exam. Every module in the course is designed to be completed in two weeks. Every module has an assignment dealing with the GridWorld case study, a hands-on lab, a ...
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Chapter 3 Control Methods
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...  To write expressions using the conditional operator (§3.5).  To display formatted output using the System.out.printf method and to format strings using the String.format method (§3.6).  To know the rules governing operator precedence and associativity ...
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... m the compiler may find problems with syntax and other basic issues m if compile-time errors exist, an executable version of the program is not created  Run-time errors m a problem can occur during program execution, such as trying to divide by zero, which causes a program to terminate abnormally ( ...
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Java performance

In software development, the Java programming language was historically considered slow because compiled Java programs run on the Java Virtual Machine rather than directly on the computer's processor like C and C++ programs do; however, in newer Java versions the execution performance has been optimized significantly mainly thanks to the introduction of just-in-time compilation. Java performance is a matter of concern because lots of business software has been written in Java after the language quickly became popular in the late 1990s and early 2000s. Concerns over its performance led to the development of specialized hardware able to run Java directly, dubbed Java processors. The performance of a compiled Java program depends on how optimally its particular tasks are managed by the host Java Virtual Machine (JVM), and how well the JVM takes advantage of the features of the hardware and OS in doing so. Thus, any Java performance test or comparison has to always report the version, vendor, OS and hardware architecture of the used JVM. In a similar manner, the performance of the equivalent natively compiled program will depend on the quality of its generated machine code, so the test or comparison also has to report the name, version and vendor of the used compiler, and its activated optimization directives.Historically, the execution speed of Java programs improved significantly due to the introduction of Just-In Time compilation (JIT) (in 1997/1998 for Java 1.1), the addition of language features supporting better code analysis, and optimizations in the JVM itself (such as HotSpot becoming the default for Sun's JVM in 2000). Hardware execution of Java bytecode, such as that offered by ARM's Jazelle, can also offer significant performance improvements.
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