dangshanli

import javax.swing.*;
import java.awt.*;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.channels.SocketChannel;

dangshanli

import java.io.*;
import java.time.LocalDate;

public class ObjStreamTest {

    public static void main(String[] args) throws IOException, ClassNotFoundException {
        Employee harry = new Employee("harry",500,1990,11,13);
        Manager carl = new Manager("carl",750,1999,12,22,harry);
        Manager tony = new Manager("tony",850,1899,1,29,harry);

dangshanli

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Arrays;
import java.util.Random;

public class ProxyTest {
    public static void main(String[] args) {
        Object[] elements = new Object[100];
        for (int i = 0; i < elements.length; i++) {

dangshanli

import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Objects;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;

dangshanli

import java.io.*;
import java.time.LocalDate;
import java.io.Serializable;

/**
 * RandomFile的使用
 * 读写Employee对象
 */
public class RandomFileTest {
    public static void main(String[] args) throws IOException {

dangshanli

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.time.LocalDate;
import java.util.Scanner;

public class TextFileTest {
    public static void main(String[] args) {
        Employee[] staff = new Employee[3];

dangshanli

//带实例域枚举，太阳系八行星
public enum Planet {
    MERCURY(3.302E+23, 2.439E6),
    VENUS(4.869e+24, 6.0e6),
    EARTH(5.975e+24, 6.3e6),
    MARS(6.4e+23, 3.39e6),
    JUPITER(1.89e+27, 7.14e7),
    SATURN(5.68e+26, 6.02e7),
    URANUS(8.68e+25, 2.55e7),
    NEPTUNE(1.02e+26, 2.477e7);

dangshanli

import lombok.Data;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * pick apples match the given conditions
 */
public class ApplePick {

dangshanli

操作	类型	返回类型	参数接口类型	签名
filter	中间	Stream	Predicate	T->boolean
distinc	中间（有状态	Stream
skip	中间(有状态)	Stream	long
limit	中间（有状态	Stream	long
map	中间	Stream	Function<T,R>	T->R
flatMap	中间	Stream	Fucntion<T,R>	T->R
sorted	中间（有状态	Stream	Camparator	(T,T)->int
anyMatch	终端	boolean	Predicate	T->boolean

dangshanli

import java.util.stream.Stream;

public class FibGenerator {
    public static void main(String[] args) {
        Stream.iterate(new int[]{0, 1}, t -> new int[]{t[1], t[0] + t[1]})
                .limit(20)
                .map(t -> t[0])
                .forEach(System.out::println);
    }
}