JakeWharton / Java6.java

Last active May 28, 2022 16:14

A comparison between non-capturing and capturing expressions across Java 6, Java 8, Java 8 with Retrolambda, Kotlin with native function expressions, and Kotlin with Java SAM expression.

	import java.util.Arrays;

	class NonCapturing {
	public static void main(String... args) {
	run(new Runnable() {
	@Override public void run() {
	System.out.println("Hey!");
	}
	});
	}

JakeWharton / visibilities.sh

Last active May 24, 2019 00:03

A bash script to count the visibility modifiers in a jar file.

	#!/bin/bash

	if [ $# != 1 ]; then
	echo "Pass jar as sole argument"
	exit 1
	fi

	tmp=`mktemp -d`
	unzip -d "$tmp" $1 1> /dev/null

JakeWharton / GenericCovariants.java

Created January 7, 2016 06:32

Unlike synthetic accessor methods, these synthetic covariant methods are hard or impossible to kill. Generics anyone?

	interface Thing<T> {
	T thing();
	}

	class CharSequenceThing implements Thing<CharSequence> {
	@Override public CharSequence thing() {
	return "CharSequence!";
	}
	}

JakeWharton / CovariantReturnTypes.java

Created January 7, 2016 05:59

Covariant return types generate an extra method in bytecode. This compounds in each subclass further specializing the type.

	interface Thing {
	Object thing();
	}

	class CharSequenceThing implements Thing {
	@Override public CharSequence thing() {
	return "CharSequence!";
	}
	}

JakeWharton / Oauth1SigningInterceptor.java

Last active August 16, 2024 12:16

An OkHttp interceptor which does OAuth1 signing. Requires Guava and Java 8, although those dependencies wouldn't be too hard to break if you didn't have them.

	/*
	* Copyright (C) 2015 Jake Wharton
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

JakeWharton / ShampooRule.java

Last active August 31, 2023 15:47

Got flaky tests? Shampoo them away with a quick JUnit rule. Apache 2.

	import org.junit.rules.TestRule;
	import org.junit.runner.Description;
	import org.junit.runners.model.Statement;

	/** Got flaky tests? Shampoo them away. */
	public final class ShampooRule implements TestRule {
	private final int iterations;

	public ShampooRule(int iterations) {
	if (iterations < 1) throw new IllegalArgumentException("iterations < 1: " + iterations);

JakeWharton / build.gradle

Created March 29, 2015 06:34

A Gradle task for installing all application variants at once. Placed in the public domain.

	def installAll = tasks.create('installAll')
	installAll.description = 'Install all applications.'
	android.applicationVariants.all { variant ->
	installAll.dependsOn(variant.install)
	// Ensure we end up in the same group as the other install tasks.
	installAll.group = variant.install.group
	}

JakeWharton / UiThreadRule.java

Last active January 12, 2024 17:43

A JUnit @rule which runs individual tests on the Android UI thread. http://b.android.com/157356

	/*
	* Copyright (C) 2015 Jake Wharton
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

JakeWharton / gist:f50f3b4d87e57d8e96e9

Created February 7, 2015 01:59

Rise and Shine™, unlock and wake up your device automatically when you deploy from the IDE. Put this somewhere in your `src/debug/` code and run it when the application or main activity starts. Apache 2.

	/**
	* Show the activity over the lockscreen and wake up the device. If you launched the app manually
	* both of these conditions are already true. If you deployed from the IDE, however, this will
	* save you from hundreds of power button presses and pattern swiping per day!
	*/
	public static void riseAndShine(Activity activity) {
	activity.getWindow().addFlags(FLAG_SHOW_WHEN_LOCKED);

	PowerManager power = (PowerManager) activity.getSystemService(POWER_SERVICE);
	PowerManager.WakeLock lock =

JakeWharton / README.md

Last active April 17, 2023 14:07

A JUnit @rule which launches an activity when your test starts. Stop extending gross ActivityInstrumentationBarfCase2!

Hi!

This test rule is now in the 'test-rules' support repository. Use that one!

https://developer.android.com/reference/android/support/test/rule/ActivityTestRule.html

Jake Wharton JakeWharton

Hi!