import java.util.*; import java.util.stream.*; class Test { public static void main(String[] args) { List list = new ArrayList(); list.add("Hello"); list.add("Hello"); list.add("World"); Map counted = list.stream() .collect(Collectors.groupingBy(Function.identity(), Collectors.counting())); System.out.println(counted); } } https://stackoverflow.com/questions/25441088/how-can-i-count-occurrences-..
public static void printList(List list) { for (Object elem: list) System.out.print(elem + " "); System.out.println(); } You use the unbounded wildcards when the list (or the collection) is of unknown types. https://stackoverflow.com/questions/29342117/what-is-the-purpose-of-list-if-one-can-only-insert-a-null-value
hdfs dfs -rm -r https://stackoverflow.com/questions/13529114/how-to-delete-a-directory-from-hadoop-cluster-which-is-having-comma-in-its-na How to Delete a directory from Hadoop cluster which is having comma(,) in its name? I have uploaded a Directory to hadoop cluster that is having "," in its name like "MyDir, Name" when I am trying to delete this Directory by using rmr hadoop shell command as ..
https://stackabuse.com/encode-a-string-to-utf-8-in-java/ Encode a String to UTF-8 in Java In this tutorial, we'll take a look at how to encode a String to UTF-8 in Java - using StandardCharsets, getBytes() with ByteBuffer and Apache Commons with examples. stackabuse.com
https://www.verywellmind.com/tips-for-finding-your-purpose-in-life-4164689 7 Ways to Find More Meaning and Purpose in Your Life Finding your purpose in life isn't just a cliche. Studies show it has real benefits for you. Here are seven things you can do to find your purpose. www.verywellmind.com
https://hydroponicglass.tistory.com/134 [JAVA] 정수의 최대값, 최소값 출력 자바에서 정수의 최대값, 최소값 출력 // java public static void main(String[] args) { System.out.println(Integer.MAX_VALUE); // 2147483647 System.out.println(Integer.MIN_VALUE); // -2147483648 } 32비.. hydroponicglass.tistory.com
int[] array = list.stream().mapToInt(i -> i).toArray(); https://stackoverflow.com/questions/960431/how-to-convert-listinteger-to-int-in-java How to convert List to int[] in Java? This is similar to this question: How to convert int[] to Integer[] in Java? I'm new to Java. How can i convert a List to int[] in Java? I'm confused because List.toArray() actually stackoverflow.com
file -bi myfile.txt https://stackoverflow.com/questions/1730878/encoding-of-file-shell-script encoding of file shell script How can I check the file encoding in a shell script? I need to know if a file is encoded in utf-8 or iso-8859-1. Thanks stackoverflow.com
System.out.println(String.valueOf(Charset.defaultCharset())); https://stackoverflow.com/questions/1006276/what-is-the-default-encoding-of-the-jvm What is the default encoding of the JVM? Is UTF-8 the default encoding in Java? If not, how can I know which encoding is used by default? stackoverflow.com
private static RestTemplate restTemplate; static { HttpComponentsClientHttpRequestFactory rf = new HttpComponentsClientHttpRequestFactory(); rf.setReadTimeout(3 * 1000); rf.setConnectTimeout(2 * 1000); restTemplate = new RestTemplate(rf); restTemplate.getMessageConverters() .add(0, new StringHttpMessageConverter(StandardCharsets.UTF_8)); } https://stackoverflow.com/questions/13837012/spring-rest..
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