Java Vector Capacity()
Java Vector 类的
capacity()方法用于获取当前
语法:
以下是
capacity()方法的声明:
参数:
此方法不接受任何参数。
返回:
此方法返回
例外:
NA
兼容版本:
Java 1.2及更高版本
示例1:
import java.util.Vector;
public class VectorCapacityExample1 {
public static void main(String arg[]) {
//Create an empty Vector with initial capacity of 5
Vector<Integer> vecObject = new Vector<Integer>(5);
//Add values in the vector
vecObject.add(3);
vecObject.add(5);
vecObject.add(2);
vecObject.add(4);
vecObject.add(1);
System.out.println("Current capacity of Vector is: "+vecObject.capacity());
}
}
输出:
Current capacity of Vector is: 5
示例2:
import java.util.Vector;
public class VectorCapacityExample2 {
public static void main(String arg[]) {
//Create an empty Vector with an initial capacity of 3
Vector<String> vc = new Vector<>(3);
//Add elements in the vector
vc.add("A");
vc.add("B");
vc.add("C");
//Print all the elements of a Vector
System.out.println("Elements of Vector are: "+vc);
System.out.println("Current capacity of Vector: "+vc.capacity());
//Add new element
vc.add("lidihuo");
//After addition, print all the elements again
System.out.println("Elements after addition: "+vc);
System.out.println("Current capacity of Vector after modification: "+vc.capacity());
}
}
输出:
Elements of Vector are: [A, B, C]
Current capacity of Vector: 3
Elements after addition: [A, B, C, lidihuo]
Current capacity of Vector after modification: 6
示例3:
import java.util.Vector;
public class VectorCapacityExample3 {
public static void main(String arg[]) {
//Create an empty Vector
Vector<String> vc = new Vector<>();
//Add elements in the vector
vc.add("A");
vc.add("B");
vc.add("C");
System.out.println("default capacity of Vector: "+vc.capacity());
}
}
输出:
default capacity of Vector: 10
