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The snippet library.

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JavaGetting Started

Read the beginning of a text value

Java: Extract or display the first three ASCII characters from a known nonempty string.

Java✓ Tested
JavaGetting Started

Read the first collection element

Java: Access index zero only after establishing that the collection is nonempty.

Java✓ Tested
JavaPrecise numeric calculations

Reject nonfinite floating-point values

Java: Double.isFinite excludes both infinity and NaN.

Java✓ Tested
JavaQueues & collection operations

Remove collection items that satisfy a condition

Java: Use removeIf on a mutable collection to avoid changing it manually inside a for-each loop.

Java✓ Tested
JavaCollections

Remove duplicate values

Preserve encounter order while removing repeated Java list values.

Java✓ Tested
JavaGetting Started

Repeat a fixed number of times

Java: Use a counted loop to print three numbered steps.

Java✓ Tested
JavaText validation & formatting

Repeat text a fixed number of times

Java: Use String.repeat with a nonnegative repetition count.

Java✓ Tested
JavaGetting Started

Repeat while a condition holds

Java: Count down while a positive number remains, updating the loop variable on each iteration.

Java✓ Tested
JavaStrings

Replace literal text

Replace all literal matches in a Java string without regular expressions.

Java✓ Tested
JavaGetting Started

Replace one collection element

Java: Update an existing element at a known valid index.

Java✓ Tested
JavaRecords & reliable control flow

Represent a finite set of states

Java: Use an enum to prevent arbitrary strings from representing application states.

Java✓ Tested
JavaGetting Started

Require two conditions to be true

Java: Combine a lower and an upper bound to check whether a value is in range.

Java✓ Tested