SonarSource Rules
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Java

Java static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your JAVA code

  • All rules 733
  • Vulnerability60
  • Bug175
  • Security Hotspot40
  • Code Smell458

  • Quick Fix 65
Filtered: 9 rules found
unpredictable
    Impact
      Clean code attribute
        1. Tests should be stable

           Code Smell
        2. Mutable fields should not be "public static"

           Code Smell
        3. Private mutable members should not be stored or returned directly

           Code Smell
        4. "Iterator.next()" methods should throw "NoSuchElementException"

           Bug
        5. "compareTo" results should not be checked for specific values

           Bug
        6. Classes and methods that rely on the default system encoding should not be used

           Code Smell
        7. String operations should not rely on the default system locale

           Code Smell
        8. Execution of the Garbage Collector should be triggered only by the JVM

           Code Smell
        9. The "Object.finalize()" method should not be overridden

           Code Smell

        Classes and methods that rely on the default system encoding should not be used

        consistency - conventional
        maintainability
        Code Smell
        • unpredictable
        • cert
        • i18n

        Why is this an issue?

        More Info

        Using classes and methods that rely on the default system encoding can result in code that works fine in its "home" environment. But that code may break for customers who use different encodings in ways that are extremely difficult to diagnose and nearly, if not completely, impossible to reproduce when it’s time to fix them.

        This rule detects uses of the following classes and methods:

        • FileReader
        • FileWriter
        • String constructors with a byte[] argument but no Charset argument
          • String(byte[] bytes)
          • String(byte[] bytes, int offset, int length)
        • String.getBytes()
        • String.getBytes(int srcBegin, int srcEnd, byte[] dst, int dstBegin)
        • InputStreamReader(InputStream in)
        • OutputStreamWriter(OutputStream out)
        • ByteArrayOutputStream.toString()
        • Some Formatter constructors
          • Formatter(String fileName)
          • Formatter(File file)
          • Formatter(OutputStream os)
        • Some Scanner constructors
          • Scanner(File source)
          • Scanner(Path source)
          • Scanner(InputStream source)
        • Some PrintStream constructors
          • PrintStream(File file)
          • PrintStream(OutputStream out)
          • PrintStream(OutputStream out, boolean autoFlush)
          • PrintStream(String fileName)
        • Some PrintWriter constructors
          • PrintWriter(File file)
          • PrintWriter(OutputStream out)
          • PrintWriter(OutputStream out, boolean autoFlush)
          • PrintWriter(String fileName)
        • methods from Apache commons-io library which accept an encoding argument when that argument is null, and overloads of those methods that omit the encoding argument
          • IOUtils.copy(InputStream, Writer)
          • IOUtils.copy(Reader, OutputStream)
          • IOUtils.readLines(InputStream)
          • IOUtils.toByteArray(Reader)
          • IOUtils.toByteArray(String)
          • IOUtils.toCharArray(InputStream)
          • IOUtils.toInputStream(TypeCriteria.subtypeOf(CharSequence))
          • IOUtils.toString(byte[])
          • IOUtils.toString(URI)
          • IOUtils.toString(URL)
          • IOUtils.write(char[], OutputStream)
          • IOUtils.write(CharSequence, OutputStream)
          • IOUtils.writeLines(Collection, String, OutputStream)
          • FileUtils.readFileToString(File)
          • FileUtils.readLines(File)
          • FileUtils.write(File, CharSequence)
          • FileUtils.write(File, CharSequence, boolean)
          • FileUtils.writeStringToFile(File, String)
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          on-premise CI
          Available Since
          9.1
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          on-premise CI
          Developer Edition
          Available Since
          9.1

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