Connecting java with robot framework

How can we use java file directly in the robot file as a library without manually compiling it to .class file ,as we can use python file as a library ???

With the end of life of Python 2 and thus Jython, that is no longer possible. I’m not entirely sure on the status of the alternatives, but I think you can still use Java libraries using the remote interface.

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If you want to use Java (e.g. to develop a Keyword Library) I recommend to look into JPype.

However, if I understand correctly you would still need to compile and package that file in a .jar.

An example. It’s just a calculator in java and the methods are called from Robot

# Boiler plate stuff to start the module
import jpype
import jpype.imports
from jpype.types import *
from inspect import getmembers, isfunction

# Launch the JVM

from org.calculator import JavaLibrary

class JavaWrapper:

    def get_keyword_names(self):
        for name, func in getmembers(JavaLibrary, isfunction):
            if name.startswith('_'):
            yield name

    def run_keyword(self, name, args, kwargs):
        print("Running keyword '%s' with positional arguments %s and named arguments %s."
              % (name, args, kwargs))
        func = getattr(JavaLibrary, name)
        return func(*args, **kwargs)

package org.calculator;
 * A class which provides functions for all basic arithmetic operations
 * add, subtract, multiply, divide, and remainder.
public class JavaLibrary {
    public static int add(int a, int b) {
		return a + b;
	public static int subtract(int a, int b) {
		return a - b;
	public static int multiply(int a, int b) {
		return a * b;
	public static int divide(int a, int b) {
		return a / b;
	public static int remainder(int a, int b) {
		return a % b;


*** Settings ***

*** Test Cases ***
Use Dynamic Library
    ${result}    Add    ${1}    ${2}
    Log    ${result}
    ${result}    Subtract    ${3}    ${1}
    Log    ${result}
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