java treemap

TreeMap类values()方法 (TreeMap Class values() method)

• values() method is available in java.util package.

  values()方法在java.util包中可用。

• values() method is used to returns a set of values that exists in this TreeMap to be viewed in a Collection.

  values()方法用于返回此TreeMap中存在的一组值，以在Collection中进行查看。

• values() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  values()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• values() method does not throw an exception at the time of returning values set.

  在返回设置的值时， values()方法不会引发异常。

Syntax:

句法：

public Collection values();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of the method is Collection, it returns all values exists in this TreeMap in a Collection view.

方法的返回类型为Collection ，它在Collection视图中返回此TreeMap中存在的所有值。

Example:

例：

// Java program to demonstrate the example // of Collection values() method of TreeMap import java.util.*;public class ValuesOfTreeMap {
       public static void main(String[] args) {
           // Instantiates TreeMap        TreeMap < Integer, String > tm = new TreeMap < Integer, String > ();        // By using put() method is        // to put the key-value pairs in        // treemap tm        tm.put(1, "C");        tm.put(4, "C++");        tm.put(3, "Java");        tm.put(2, "Php");        // Display TreeMap tm1        System.out.println("tm: " + tm);        // By using values() method is to        // get all the values of TreeMap to         // be viewed in a Collection        Collection co = tm.values();        // Display Collection view        System.out.println("tm.values(): " + co);    }}

Output

输出量

tm: {1=C, 2=Php, 3=Java, 4=C++}tm.values(): [C, Php, Java, C++]

翻译自:

java treemap