entrofi

Summary and Examples of Java 10 Developer Features

Local variable type inference

entrofi

@Override
public String greet(String name) {
    initReporter();
    Supplier<String> oldSupplier = () -> this.oldService.greet(name);
    Supplier<String> newSupplier = () -> this.newService.greet(name);
    String greetingMessage = null;
    try {
        greetingMessage = this.serviceExperiment.run(oldSupplier, newSupplier);
    } catch (Exception e) {
        LOGGER.error("Exception occurred while running the experiment", e);

entrofi

#!groovy
import hudson.security.*
import jenkins.model.*

def instance = Jenkins.getInstance()
def username = 'admin_groovy'

def hudsonRealm = new HudsonPrivateSecurityRealm(false)
hudsonRealm.createAccount(username,'123456')
instance.setSecurityRealm(hudsonRealm)

entrofi

#!groovy

import jenkins.model.*
import hudson.util.*;
import jenkins.install.*;

def instance = Jenkins.getInstance()

instance.setInstallState(InstallState.INITIAL_SETUP_COMPLETED)

entrofi

Tmux CheatSheet

Session Management

tmux new -s session_name creates a new tmux session named session_name

tmux attach -t session_name attaches to an existing tmux session named session_name

tmux switch -t session_name switches to an existing session named session_name

entrofi

FROM mysql:8.0

LABEL description="My Custom Mysql Docker Image"

# Add a database
ENV MYSQL_DATABASE CARDS

#Check out docker entry point for further configuration :
# https://github.com/docker-library/mysql
COPY ./init-scripts/ /docker-entrypoint-initdb.d/

entrofi

@Entity
public class Note {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String title;

    private String details;

entrofi

List<SomeComparableObject> objects = Arrays.asList( o1, o2, o3, ...);
ojbects.sort((SomeComparableObject o1, SomeComparableObject o2) -> o1.compareTo(o2)); // or with method reference
objects.sort(SomeComparableObject::compareTo);

entrofi

public class Loop {
     public static void main(String[] args) {
         int[][] tests = {{6, 5, 4, 3, 2, 1}, {1, 2},
                 {1, 2, 3}, {1, 2, 3, 4}, {1}};
         int successCount = 0;
         try {
             int i = 0;
             while (true) {
                 if (thirdElementIsThree(tests[i++]))
                     successCount++;

entrofi

    @Bean(name = JPA_PROPERTIES_BEAN_NAME)
    public Properties jpaPropertiesUnitTest() {
        Properties properties = new Properties();
        properties.put(PROPERTY_HIBERNATE_DIALECT, "org.hibernate.dialect.H2Dialect");
        properties.put(PROPERTY_HIBERNATE_SHOW_SQL, true);
        properties.put(PROPERTY_HIBERNATE_FROMAT_SQL, true);
        properties.put(PROPERTY_HIBERNATE_DDL, VALUE_HIBERNATE_DDL_UPDATE);
        properties.put(PROPERTY_HIBERNATE_NAMING_STRATEGY, VALUE_HIBERNATE_DEFAULT_NAMING_STRATEGY);
        properties.put(PROPERTY_HIBERNATE_CONNECTION_CHARSET, DEFAULT_CHARSET);