package?ChatByUDP;

import?javafx.application.Application;
import?javafx.application.Platform;
import?javafx.scene.Scene;
import?javafx.scene.control.*;
import?javafx.scene.layout.Pane;
import?javafx.stage.Stage;
import?javafx.stage.WindowEvent;

import?java.io.IOException;
import?java.net.*;

public?class?AnotherChatParticipant?extends?Application?{

????public?static?void?main（String[]?args）?{
????????launch（args）;
????}

????@Override
????public?void?start（Stage?primaryStage）?{
????????TextField?textField?=?new?TextField（）;

????????Button?button?=?new?Button（“發(fā)送“）;
????????button.setTranslateX（140）;
????????button.setOnAction（event?->?{
????????????String?content?=?textField.getText（）;
????????????if（content?==?null?||?content.equals（““））{
????????????????Alert?alert?=?new?Alert（Alert.AlertType.WARNING?“請輸入發(fā)送內容“?ButtonType.OK）;
????????????????alert.show（）;
????????????????return;
????????????}

????????????byte[]?message?=?content.getBytes（）;
????????????try?{
????????????????DatagramSocket?datagramSocket?=?new?DatagramSocket（）;
????????????????//?數(shù)據(jù)包發(fā)往IP：127.0.0.1，端口：10002
????????????????DatagramPacket?datagramPacket?=?new?DatagramPacket（message?message.length?InetAddress.getByName（“127.0.0.1“）?10002）;
????????????????datagramSocket.send（datagramPacket）;
????????????}?catch?（UnknownHostException?e）?{
????????????????e.printStackTrace（）;
????????????}?catch?（SocketException?e）?{
????????????????e.printStackTrace（）;
????????????}?catch?（IOException?e）?{
????????????????e.printStackTrace（）;
????????????}
????????}）;

????????Label?label?=?new?Label（）;
????????label.setTranslateY（50）;
????????new?Thread（（）?->?{
????????????try?{
????????????????//?創(chuàng)建IP：127.0.0.1，端口：10003的Socket監(jiān)聽
????????????????DatagramSocket?datagramSocket?=?new?DatagramSocket（10003?InetAddress.getByName（“127.0.0.1“））;
????????????????while?（true）?{
????????????????????byte[]?receivedData?=?new?byte[1024];
????????????????????DatagramPacket?datagramPacket?=?new?DatagramPacket（receivedData?receivedData.length）;
????????????????????datagramSocket.receive（datagramPacket）;
????????????????????//?未收到則后續(xù)不執(zhí)行
????????????????????Platform.runLater（（）?->
????????????????????????????label.setText（new?String（datagramPacket.getData（）?0?datagramPacket.getLength（）））
????????????????????）;
????????????????}
????????????}?catch?（UnknownHostException?e）?{
????????????????e.printStackTrace（）;
????????????}?catch?（SocketException?e）?{
????????????????e.printStackTrace（）;
????????????}?catch?（IOException?e）?{
????????????????e.printStackTrace（）;
????????????}
????????}）.start（）;

????????primaryStage.settitle（“AnotherChatParticipant“）;
????????Pane?pane?=?new?Pane（textField?button?label）;
????????primaryStage.setScene（new?Scene（pane?400?200））;
????????primaryStage.setX（500）;
????????primaryStage.setY（100）;
????????primaryStage.show（）;

????????primaryStage.addEventHandler（WindowEvent.WINDOW_CLOSE_REQUEST