我目前正在研究二叉搜索树,我想知道如果你尝试插入一个与根相同的元素,你会怎么做？它去哪儿了？
我试图在Linux服务器上运行我的.jar文件.
这些是我正在运行的命令
JAVA_HOME=/app/local/opt/jdk/packages/jdk1.6.0_30/
export PATH=$JAVA_HOME/bin:$PATH
cd folder
nohup java -jar program.jar &
在星期五跑步时,这很完美.但是,今天我到了
Unrecognised option: - Could not create the Java virtual machine.
在我的nohup.out中
如果我在设置路径后运行java -v,我会遇到同样的问题.谁能提出任何建议？真的很困惑.
感谢您的帮助.
我有以下 vue 组件：
<template>
<div class ="container bordered">
<div class="row">
<div class="col-md-12">
<CommitChart :data="chartOptions"></Commitchart>
</div>
</div>
</div>
</template>
<script>
import CommitChart from './CommitChart';
export default {
data() {
return {
chartOptions: {
labels: ['pizza', 'lasagne', 'Cheese'],
datasets: [{
label: '# of Votes',
data: [12, 19, 3],
backgroundColor: [
'rgba(10, 158, 193, 1)',
'rgba(116, 139, 153, 1)',
'rgba(43, 94, 162, 1)',
],
borderColor: [
'rgba(44, 64, 76, 1)',
'rgba(44, 64, 76, 1)',
'rgba(44, 64, 76, 1)',
],
borderWidth: 3
}],
}, …对于我目前的java练习,我必须从2个不同的Gmail帐户获取邮件.我通过创建我的gmail类的新实例来完成此操作.gmail类扩展了线程,在其中有一个同步方法readMail(),它获取邮件并打印它.这个readMail方法由run方法在while(true)循环中调用,然后它休眠30秒,这个想法是它每30秒获取一次邮件.但是,synchronized方法似乎不起作用.线程相互中断,并且该方法在其他线程中断并开始打印之前不会打印消息的所有项目.
任何建议将不胜感激.
请看下面给我带来麻烦的方法:
public synchronized void readMail() throws MessagingException, IOException {
Folder inbox = store.getFolder("Inbox");
inbox.open(Folder.READ_ONLY);
messages = inbox.getMessages();
// System.out.println("No of Messages : " + inbox.getMessageCount());
// System.out.println("No of Unread Messages : "
// + inbox.getUnreadMessageCount());
for (int i = 0; i < inbox.getUnreadMessageCount(); i++) {
System.out
.println("*****************************************************************************");
System.out.println("NEW MESSAGE " + (i + 1) + ":");
msg = messages[i];
// System.out.println(msg.getMessageNumber());
// Object String;
// System.out.println(folder.getUID(msg)
String subject = msg.getSubject();
System.out.println("Subject: " + subject);
System.out.println("From: " + msg.getFrom()[0]); …考虑Bootstrap手风琴:
<div class="card">
<div class="card-header" role="tab" id="headingOne">
<div data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
i'm not collapsed
</div>
<div id="collapseOne" class="collapse show" role="tabpanel" aria-labelledby="headingOne">
<div class="card-block">
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on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore …