wolanx/mathjava

mathjs.org json parse via java

JavaApache-2.0

mathjava

mathjs.org json parse via java

Install

<dependency>
  <groupId>com.zx5435</groupId>
  <artifactId>mathjava</artifactId>
  <version>1.0</version>
</dependency>

implementation 'com.zx5435:mathjava:1.0'

How to use it

String a = "{'value': 3, 'mathjs': 'ConstantNode'}";
Double x = Mathjs.compileString(a).evaluate();
// output 3.0

String a = "{\"fn\": \"multiply\", \"op\": \"*\", \"args\": [{\"value\": 2, \"mathjs\": \"ConstantNode\"}, {\"name\": \"x\", \"mathjs\": \"SymbolNode\"}], \"mathjs\": \"OperatorNode\", \"implicit\": false}";
Double x = Mathjs.compileString(a).evaluate(new HashMap<String, Double>() {{
    put("x", 123.0);
}});
// output 2 * x = 246.0

Mathjs supported nodes