peter-lawrey

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Member;

/**
 * @author peter.lawrey
 */
@Retention(RetentionPolicy.RUNTIME)
public @interface CustomAnnotation {
    public int value() default 0;

peter-lawrey

import java.lang.reflect.Member;

/**
* @author peter.lawrey
*/
public interface AnnotationHandler<A> {
    void process(Model model, Member member, A annotation);
}

peter-lawrey

public class A {
    public interface B {
        public enum C {;
            public @interface D {
                public class E {
                    // etc etc
                }
            }
        }
    }

peter-lawrey

import java.lang.reflect.Field;

class MainClass {
    // requires Java 7 update 5+
    static {
        try {
            Field value = String.class.getDeclaredField("value");
            value.setAccessible(true);
            value.set("B", value.get("ABC"));
        } catch (Throwable e) {

peter-lawrey

package com.higherfrequencytrading.chronicle.example;

import com.higherfrequencytrading.chronicle.Chronicle;
import com.higherfrequencytrading.chronicle.Excerpt;
import com.higherfrequencytrading.chronicle.impl.IndexedChronicle;
import com.higherfrequencytrading.chronicle.tools.ChronicleTools;

/**
 * @author Julien Eluard
 * @author peter.lawrey

peter-lawrey

Index: src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java	(revision 9f6a0e678ebfed5aa8d636886fae35be1cca092f)
+++ src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java	(revision )
@@ -118,7 +118,7 @@
         for (l = 0; l < achunksection.length; ++l) {
             if (achunksection[l] != null && (!flag || !achunksection[l].isEmpty()) && (i & 1 << l) != 0) {

peter-lawrey

public static void main(String[] args) {
    Stream.of(Boolean.class, Byte.class, Character.class, Short.class, Integer.class,
            Long.class, Float.class, Double.class, Void.class).map(c -> {
        try {
            return c.getField("TYPE").get(null);
        } catch (Exception e) {
            throw new AssertionError(e);
        }
    }).forEach(System.out::println);
}

peter-lawrey

/*
In Java 8 this program prints

java.lang.Throwable
	at A.printStackTrace(A.java:8)
	at A.<clinit>(A.java:5)
	at java.lang.Class.forName0(Native Method)

Note: <clinit> is the static initializer method for interface A
 */

peter-lawrey

public class PingPongMain {
    public static void main(String[] args) throws InterruptedException {
        new Thread(() -> {
            try {
                synchronized ("bb") {
                    while (true) {
                        "bb".wait();
                        "bb".notifyAll();
                        System.out.println("b");
                    }

peter-lawrey

public class MemoryCopy {
    private static final Unsafe UNSAFE;

    static {
        Unsafe unsafe = null;
        try {
            Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
            theUnsafe.setAccessible(true);
            unsafe = (Unsafe) theUnsafe.get(null);
        } catch (Exception ex) {