Pyjinn Tutorial 01 – Introduction to Java Access

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• Save with the .pyj extension and run it in the Minescript 5.0 environment.
• https://minescript.net/pyjinn/
• Environment: MC 1.21.8 / MS 5.0b1 / MS+ 0.09a / Pyjinn / Fabric

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🎥 YouTube

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0. eval Command

\eval "version_info()"

\eval "import sys" "print(sys.version)"

\eval "print(player_position())"

\eval 'add_event_listener("key", lambda e: print("hello!") if e.key==46 and e.action==1 else None)'

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1. Basic “Hello, Pyjinn!” Message

Displays text in the Minecraft chat.

#!python
from minescript import *

echo("Hello, Pyjinn!")

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2. Java Class Example — Using java.lang.String

Creates a Java String object from Pyjinn and prints it in Minecraft chat.

#!python
from minescript import *

String = JavaClass("java.lang.String")
hello = String("Hello from Java String!")
echo(hello)

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3. Java Stream API with Pyjinn Lambdas

Uses Java’s Stream API to filter even numbers and square them, then displays the result.

#!python
from minescript import *

List = JavaClass("java.util.List")
java_list = [1, 2, 3, 4, 5].getJavaList()

result = java_list.stream() \
    .filter(lambda x: x % 2 == 0) \
    .map(lambda x: x * x) \
    .toList()

echo(f"Even squares: {result}")

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4. Timer with set_interval

Displays a message every second, stopping after 5 times.

#!python
from minescript import *

count = 0

def tick():
    global count
    count += 1
    echo(f"Tick count: {count}")
    if count >= 5:
        # Stop the timer after 5 ticks
        remove_event_listener(timer_id)

timer_id = set_interval(tick, 1000)  # Call tick() every 1000ms