from queue import Queue from threading import Thread from time import sleep def producter(): num = 1 while True: if queue.qsize()<5: print(f"生产{num}号，手机") queue.put(f"手机：{num}号，") num+=1 else: print("库存满了，请消费") sleep(1) def consumer(): while True: print(f"获取手机：{queue.get()}") sleep(1) if __name__ == '__main__': queue=Queue() p = Thread(target=producter()) p.start() c = Thread(target=consumer()) c.start() c2 = Thread(target=consumer()) c2.start()
消费线程没有启动，好奇怪
安装pycharm开发环境，安装完成后，点击run，出现下面情况，怎么解决
在平时学习的时候，有什么办法可以锻炼编程的逻辑思维能力？
为什么我的这样？浏览器还报404
[INFO] Scanning for projects... [INFO] [INFO] ----------------< com.itbaizhan.maven:maven-helloworld >---------------- [INFO] Building 第一个maven工程 0.0.1-SNAPSHOT [INFO] --------------------------------[ war ]--------------------------------- [INFO] [INFO] >>> tomcat7-maven-plugin:2.1:run (default-cli) > process-classes @ maven-helloworld >>> [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ maven-helloworld --- [WARNING] Using platform encoding (GBK actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ maven-helloworld --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] <<< tomcat7-maven-plugin:2.1:run (default-cli) < process-classes @ maven-helloworld <<< [INFO] [INFO] [INFO] --- tomcat7-maven-plugin:2.1:run (default-cli) @ maven-helloworld --- [INFO] Running war on http://localhost:8080/ [INFO] Creating Tomcat server configuration at D:\1JAVA培训班\源码文件\maven源码(1)\maven-helloworld\target\tomcat [INFO] create webapp with contextPath: 六月 10, 2023 11:41:07 下午 org.apache.coyote.AbstractProtocol init 信息: Initializing ProtocolHandler ["http-bio-8080"] 六月 10, 2023 11:41:07 下午 org.apache.coyote.AbstractProtocol init 严重: Failed to initialize end point associated with ProtocolHandler ["http-bio-8080"] java.net.BindException: Address already in use: JVM_Bind <null>:8080 at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:406) at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:610) at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:429) at org.apache.coyote.http11.AbstractHttp11JsseProtocol.init(AbstractHttp11JsseProtocol.java:119) at org.apache.catalina.connector.Connector.initInternal(Connector.java:981) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) at org.apache.catalina.core.StandardService.initInternal(StandardService.java:559) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:814) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139) at org.apache.catalina.startup.Tomcat.start(Tomcat.java:335) at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1091) at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:512) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105) at org.apache.maven.cli.MavenCli.execute(MavenCli.java:972) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:293) at org.apache.maven.cli.MavenCli.main(MavenCli.java:196) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347) Caused by: java.net.BindException: Address already in use: JVM_Bind at java.net.DualStackPlainSocketImpl.bind0(Native Method) at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:106) at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387) at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190) at java.net.ServerSocket.bind(ServerSocket.java:375) at java.net.ServerSocket.<init>(ServerSocket.java:237) at java.net.ServerSocket.<init>(ServerSocket.java:181) at org.apache.tomcat.util.net.DefaultServerSocketFactory.createSocket(DefaultServerSocketFactory.java:49) at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:393) ... 35 more 六月 10, 2023 11:41:07 下午 org.apache.catalina.core.StandardService initInternal 严重: Failed to initialize connector [Connector[HTTP/1.1-8080]] org.apache.catalina.LifecycleException: Failed to initialize component [Connector[HTTP/1.1-8080]] at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:106) at org.apache.catalina.core.StandardService.initInternal(StandardService.java:559) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:814) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139) at org.apache.catalina.startup.Tomcat.start(Tomcat.java:335) at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1091) at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:512) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105) at org.apache.maven.cli.MavenCli.execute(MavenCli.java:972) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:293) at org.apache.maven.cli.MavenCli.main(MavenCli.java:196) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347) Caused by: org.apache.catalina.LifecycleException: Protocol handler initialization failed at org.apache.catalina.connector.Connector.initInternal(Connector.java:983) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) ... 30 more Caused by: java.net.BindException: Address already in use: JVM_Bind <null>:8080 at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:406) at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:610) at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:429) at org.apache.coyote.http11.AbstractHttp11JsseProtocol.init(AbstractHttp11JsseProtocol.java:119) at org.apache.catalina.connector.Connector.initInternal(Connector.java:981) ... 31 more Caused by: java.net.BindException: Address already in use: JVM_Bind at java.net.DualStackPlainSocketImpl.bind0(Native Method) at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:106) at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387) at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190) at java.net.ServerSocket.bind(ServerSocket.java:375) at java.net.ServerSocket.<init>(ServerSocket.java:237) at java.net.ServerSocket.<init>(ServerSocket.java:181) at org.apache.tomcat.util.net.DefaultServerSocketFactory.createSocket(DefaultServerSocketFactory.java:49) at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:393) ... 35 more 六月 10, 2023 11:41:07 下午 org.apache.catalina.core.StandardService startInternal 信息: Starting service Tomcat 六月 10, 2023 11:41:07 下午 org.apache.catalina.core.StandardEngine startInternal 信息: Starting Servlet Engine: Apache Tomcat/7.0.37
一。我遇到的问题
1）我会用foreach可以读取简单类型的数组，但这个类型的数组如何读取？
user arr6[]= {new user(232,"鸿焱"),new user(254,"鸿33焱")}; for(String T :arr6) System.out.println(T); //如何输出arr6？2）java里有没有一维数组、二维数组或是多维数组？
二、代码
package cn.ext.ShuZhu; public class ShuZhu { public static void main(String[] agrs) { int[] arr1; arr1 = new int[5]; for(int i=0;i<arr1.length;i++) arr1[i]=i*10; for(int m :arr1) System.out.println(m); user arr6[]= {new user(232,"鸿焱"),new user(254,"鸿33焱")}; for(String T :arr6) System.out.println(T); //如何输出arr6？ } } class user{ private int id; private String name; public user(int id, String name) { //super(); this.id = id; this.name = name; // System.out.println(id+name); } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } }
三、暂无思路
老师 我这请求超时了怎么不报错？？？？？？？？？？？？？？？？？？？？？？？？
老师，我运行es成功了,但是http请求不了
老师，编码和解码怎么理解，解码就是打开文件或程序的过程，编码就是把打开的文件或程序显示出来的过程吗
老师，这是我的代码，错误提示是，foreach只能在1.5的环境下使用，但是我的是1.8的，而且我看了我的build path，我确实是配置的1.8的jdk
#coding=utf-8 '''测试一个经典的GUI算法，通过面向对象的方法''' from tkinter import * from tkinter import messagebox class Application(Frame): def __init__(self ,master=None): super().__init__(master) self.master=master self.pack() self.createwidget() def createwidget(self): self.btn01=Button(self) self.btn01["text"]="点击送花" self.btn01.pack() self.btn01["command"]=self.songhua() self.btnquit=Button(self,text="退出",command=root.destroy) self.btnquit.pack() def songhua(self): messagebox.showinfo("送花","送你一朵小红花") if __name__ == "__main__": root=Tk() root.geometry("500x500+500+400") root.title("消息") app=Application(master=root) root.mainloop()
为什么我运行结果没有点击直接弹出那个消息窗口。关掉窗口后才出现退出按钮
我想问下，这个代码是我拷贝的，现在无法正常运行，我该如何才能让我的代码重新编译后运行。直接还有很多乱码。jdk我已经选择了1.8。
老师，能否将课件共享一下，视频讲的有点快，想看一下文字描述
老师感觉这些都是学过的增删改查呀，基本上把代码复制粘贴在代码中增删改查就可以，业务逻辑也是增删改查，这些基础在实际开发前期就够用了嘛？？
非常抱歉给您带来不好的体验！为了更深入的了解您的学习情况以及遇到的问题，您可以直接拨打投诉热线：
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消费线程没有启动，好奇怪
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