方法removeAllElements()在Java中做什么？
removeAllElements()方法被用来从这个载体移除所有组件，并将其大小设置为零。此方法的功能与clear方法相同。
示例
import java.util.Vector;
public class VectorDemo {
public static void main(String[] args) {
Vector<Integer> vec = new Vector<Integer>(4);
vec.add(4);
vec.add(3);
vec.add(2);
vec.add(1);
System.out.println("Added numbers are :- ");
for (Integer number : vec) {
System.out.println("Number = " + number);
}
System.out.println("Size of the vector: "+vec.size());
System.out.println("Removing all elements");
vec.removeAllElements();
System.out.println("Now size of the vector: "+vec.size());
}
}输出结果
Added numbers are :- Number = 4 Number = 3 Number = 2 Number = 1 Size of the vector: 4 Removing all elements Now size of the vector: 0