}elseif(grade>60){ System.out.println("中等"); }elseif(grade<60){ System.out.println("不及格"); }else{ System.out.println("正在测试");} } }
if (!file.exists()) { return; } if (file.isFile()) { file.delete(); } else if (file.isDirectory()) { File[] files = file.listFiles(); for (File myfile : files) { System.out.println(":" + myfile.getAbsolutePath()); deleteFiles(myfile.getAbsolutePath()); } file.delete(...
获取File对象 在Java中,我们可以通过File类来表示文件或目录,可以使用File类的构造函数来创建一个File对象。下面是一个简单的示例代码: importjava.io.File;publicclassMain{publicstaticvoidmain(String[]args){Filefile=newFile("example.txt");if(file.exists()){System.out.println("File exists!");}else{Sys...
intnum=2;if(num==1){System.out.println('One');}elseif(num==2){System.out.println('Two');}else{System.out.println('Not one or two');}#Output:#'Two' Java Copy This code does the same thing as our previous switch statement example, but it uses if-else statements instead. If-els...
length, s=0; if(fs >10 ){ alert("上传的文件数量超过10个了!请重新选择!"); }else{ for(var i=0;i<fs;i++){ if(files[i].size > 1024*1024){ alert('"'+files[i].name + "这个文件大于1M!请重新选择!"); } } } 实例 代码语言:javascript 代码运行次数:0 运行 AI代码解释 <!
}elseif(key.toString().equals("hadoop")){ //输出到hadoop/hadoopfile-r-00000文件 mos.write("hadoopfile", key, V,"hadoop/"); } } 3、在创建job时,定义附加的输出文件,这里的文件名称与第二步设置的文件名相同 //定义附加的输出文件 MultipleOutputs.addNamedOutput(job,"hello",TextOutputFormat.clas...
if (in == null) dString = new Date().toString(); else dString = getNextQuote(); buf = dString.getBytes();InetAddress group = InetAddress.getByName("203.0.113.0");DatagramPacket packet; packet = new DatagramPacket(buf, buf.length,group, 4446); ...
} else if(key.equals("中国人")){ mos.write("cperson", arg0,t);} //System.out.println("Reduce: "+arg0.toString()+" "+t.toString());} } Override protected void cleanup(Context context)throws IOException, InterruptedException { mos.close();//释放资源 } } public static...
JavaSwitchMultiple Case Dieswitch-Anweisung ist eine Mehrwege-Verzweigungsanweisung, die anstelle desif-elseif-Szenarios verwendet wird. Dieswitch-Anweisung führt eine Anweisung für mehrere Bedingungen aus. Diese Bedingungen werden incaseszugewiesen, und eineswitch-Anweisung kann mehrere Fälle ...
C# WPF DataTrigger for Background if Value is Null c# wpf firing dispatcherTimer on separate thread(should update UI) C# wpf Image load from any folder C# WPF Label content change C# WPF label font is not changing C# WPF multithreading cannot return the actual value from Dispatcher.BeginInvoke ...