The Simple Script Engine is a lightweight and versatile library for evaluating mathematical and logical expressions.
This implements JSR-223 ScriptEngine interface and provides a simple expression language for evaluating expressions.
- Supports basic arithmetic operations: +, -, *, /, and %.
- Handles logical operations: AND, OR, and comparisons <, >, <=, >=, ==, !=
- Supports parentheses for grouping expressions.
- Adding human friendly operator tokens.
| Token | Operation |
|---|---|
| and | Logical AND |
| or | Logical OR |
| = | Equal |
| not | Not Equal |
- The library is compatible with Android.
- Tested on Android 8.0(API level 26) emulator
- On Android, you can just use the SimpleExpressionEvaluator class directly.
It is required Java 17 or higher.
To add gradle dependency:
implementation 'com.github.vrerv:simple-script-engine:0.1.8'To evaluate an expression:
public static void main(String[] args) throws ScriptException { ScriptEngine engine = new ScriptEngineManager().getEngineByName("SimpleExpressionEvaluator"); SimpleScriptContext scriptContext = new SimpleScriptContext(); scriptContext.setBindings(new SimpleBindings(Map.of( "a", 10, "b", 20 )), ScriptContext.ENGINE_SCOPE); System.out.println("Result: " + engine.eval("a + b > 10", scriptContext)); }