Java AbstractCollection类的toString()方法
toString()的类类AbstractCollection的方法用来返回这个集合中的元素的字符串表示。
语法如下
public String toString()
要使用Java中的AbstractCollection类，请导入以下包
import java.util.AbstractCollection;
以下是toString()在Java中实现AbstractCollection方法的示例
示例
import java.util.ArrayList;
import java.util.AbstractCollection;
public class Demo {
public static void main(String[] args) {
AbstractCollection<Object> absCollection = new ArrayList<Object>();
absCollection.add("HDD");
absCollection.add("Earphone");
absCollection.add("Headphone");
absCollection.add("Card Reader");
absCollection.add("SSD");
absCollection.add("Pen Drive");
System.out.println("Count of Elements in the AbstractCollection = " + absCollection.size());
System.out.println("AbstractCollection = " + absCollection.toString());
}
}输出结果
Count of Elements in the AbstractCollection = 6 AbstractCollection = [HDD, Earphone, Headphone, Card Reader, SSD, Pen Drive]