Java Language
- Getting started with Java Language
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- Java Performance Tuning
- Java Pitfalls - Exception usage
- Java Pitfalls - Language syntax
- Java Pitfalls - Nulls and NullPointerException
- Java Pitfalls - Performance Issues
- Pitfall - Calling 'new String(String)' is inefficient
- Pitfall - Calling System.gc() is inefficient
- Pitfall - Efficiency concerns with regular expressions
- Pitfall - Interning strings so that you can use == is a bad idea
- Pitfall - Iterating a Map's keys can be inefficient
- Pitfall - Over-use of primitive wrapper types is inefficient
- Pitfall - Small reads / writes on unbuffered streams are inefficient
- Pitfall - String concatenation in a loop does not scale
- Pitfall - The overheads of creating log messages
- Pitfall - Using 'new' to create primitive wrapper instances is inefficient
- Pitfall - Using size() to test if a collection is empty is inefficient.
- Java Pitfalls - Threads and Concurrency
- Java plugin system implementations
- Java Print Service
- Java SE 7 Features
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- log4j / log4j2
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- Reflection API
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- Splitting a string into fixed length parts
- Stack-Walking API
- Streams
- String Tokenizer
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- StringBuilder
- Strings
- sun.misc.Unsafe
- super keyword
- The Classpath
- The Java Command - 'java' and 'javaw'
- The java.util.Objects Class
- ThreadLocal
- TreeMap and TreeSet
- Type Conversion
- Unit Testing
- Using Other Scripting Languages in Java
- Using the static keyword
- Using ThreadPoolExecutor in MultiThreaded applications.
- Varargs (Variable Argument)
- Visibility (controlling access to members of a class)
- WeakHashMap
- XJC
- XML Parsing using the JAXP APIs
- XML XPath Evaluation
- XOM - XML Object Model
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Java LanguageJava Pitfalls - Performance Issues
Introduction
This topic describes a number of "pitfalls" (i.e. mistakes that novice java programmers make) that relate to Java application performance.
Remarks
This topic describes some "micro" Java coding practices that are inefficient. In most cases, the inefficiencies are relatively small, but it is still worth avoiding them is possible.
Java Pitfalls - Performance Issues Related Examples
- Pitfall - Calling 'new String(String)' is inefficient
- Pitfall - Calling System.gc() is inefficient
- Pitfall - Efficiency concerns with regular expressions
- Pitfall - Interning strings so that you can use == is a bad idea
- Pitfall - Iterating a Map's keys can be inefficient
- Pitfall - Over-use of primitive wrapper types is inefficient
- Pitfall - Small reads / writes on unbuffered streams are inefficient
- Pitfall - String concatenation in a loop does not scale
- Pitfall - The overheads of creating log messages
- Pitfall - Using 'new' to create primitive wrapper instances is inefficient
- Pitfall - Using size() to test if a collection is empty is inefficient.
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