java.lang APIs

Categories

• Var

Composite Recipes

Recipes that include further recipes, often including the individual recipes below.

• A collection of String rules
• Find Virtual Thread opportunities
• Find non-virtual ExecutorService creation
• Use local variable type inference
• Use modernized java.lang APIs

Recipes

• Add explicit import for Record classes
• Add null check to existing switch cases
• Convert assigning Switch statements to Switch expressions
• Convert switch cases where every case returns into a returned switch expression
• Convert switch expression yield to arrow
• If-else-if-else to switch
• Migrate public static void main(String[] args) to instance void main()
• Prefer String.formatted(Object...)
• Replace 0 < s.length() with !s.isEmpty()
• Replace String.indexOf(String, 0) with String.indexOf(String)
• Replace String.indexOf(char, 0) with String.indexOf(char)
• Replace Thread.resume(), Thread.stop(), and Thread.suspend() with throw new UnsupportedOperationException()
• Replace lower and upper case String comparisons with String.equalsIgnoreCase(String)
• Replace redundant String method calls with self
• Replace unused variables with underscore
• Use Character#isJavaIdentifierPart(char)
• Use Character#isJavaIdentifierStart(char)
• Use Character#isWhitespace(char)
• Use Class#getDeclaredConstructor().newInstance()
• Use ClassLoader#defineClass(String, byte[], int, int)
• Use Process#waitFor(Duration)
• Use Runtime.Version#feature()
• Use Runtime.Version#interim()
• Use Runtime.Version#update()
• Use SecurityManager#checkMulticast(InetAddress)
• Use switch cases labels for enums
• Use switch cases refinement when possible
• Use text blocks