taichi

/*
 * Copyright 2015 SATO taichi
 *
 * 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

taichi

/*
 * Copyright 2015 SATO taichi
 *
 * 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

taichi

/*
 * Copyright 2015 SATO taichi
 *
 * 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

taichi

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.function.Supplier;

public class MemoizeSupplier<T> implements Supplier<T> {

	final Supplier<T> delegate;
	ConcurrentMap<Class<?>, T> map = new ConcurrentHashMap<>(1);

	public MemoizeSupplier(Supplier<T> delegate) {

taichi

import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;
import java.lang.ref.Reference;
import java.lang.ref.SoftReference;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.net.URI;

taichi

import java.util.Optional;
import java.util.function.Function;

public class Main {
	public static void main(String[] args) {
		Optional.of("aaa")
				.map(s -> new F<>(s)) // (1) no problem
				.map(t ->             // (2) <U> is Object. this is incorrect. JDK resolve <U> is Integer.
				    t.map(f -> 200))  // (3) <Z> is Integer. no problem.
				.map(n -> n + 300)    // (4) n is Object. but should be Integer.

taichi

/**
 * @author taichi
 */
@FunctionalInterface
public interface ExceptionalFunction<T, R, EX extends Exception> {

	R apply(T t) throws EX;
}

taichi

import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;

public class Main {

	public static void main(String[] args) throws Exception {

taichi

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;


public class Js {

	public static void main(String[] args) throws Exception {
		ScriptEngineManager manager = new ScriptEngineManager();
		ScriptEngine se = manager.getEngineByExtension("js");
		System.out.println(se.eval("Object.freeze"));

taichi

import java.io.OutputStream;
import java.io.Writer;

public class Main {
	
	public static String exec(Object value) { return null; }
	
	public static void exec(Object value, Appendable appendable) {}
	
	public static void main(String[] args) {