在Java中获取TreeSet的大小
要获取TreeSet的大小，请使用size()方法。
创建一个TreeSet并向其中添加元素-
TreeSet<String> tSet = new TreeSet<String>();
tSet.add("78");
tSet.add("56");
tSet.add("88");
tSet.add("12");现在，获取TreeSet的大小-
tSet.size()
以下是获取Java中TreeSet大小的示例-
示例
import java.util.*;
public class Demo {
public static void main(String args[]){
TreeSet<String> tSet = new TreeSet<String>();
tSet.add("78");
tSet.add("56");
tSet.add("88");
tSet.add("12");
System.out.println("TreeSet elements...");
Iterator<String> i = tSet.iterator();
while(i.hasNext()){
System.out.println(i.next());
}
System.out.println("Size of TreeSet = " + tSet.size());
System.out.println("Removing Highest Value = "+tSet.pollLast());
System.out.println("\nUpdated TreeSet elements...");
i = tSet.iterator();
while(i.hasNext()){
System.out.println(i.next());
}
System.out.println("Size of TreeSet after removing an element = " + tSet.size());
}
}输出结果
TreeSet elements... 12 56 78 88 Size of TreeSet = 4 Removing Highest Value = 88 Updated TreeSet elements... 12 56 78 Size of TreeSet after removing an element = 3