Java 中 LinkedBlockingQueue toString()方法示例
原文:https://www . geeksforgeeks . org/linkedblockingqueue-tostring-method-in-Java-with-examples/
LinkedBlockingQueue 的 toString() 方法返回 LinkedBlockingQueue 元素的字符串表示。LinkedBlockingQueue 的字符串包含从第一个(头)到最后一个(尾)的元素，以适当的顺序放在方括号(“[]”)中。元素由字符“，”分隔(逗号和空格)。所以基本上 toString()方法用于将 LinkedBlockingQueue 的所有元素转换成字符串表示形式。
此方法覆盖类抽象集合T1 中的 toString()
语法:
public String toString()
返回值:这个方法返回一个 String，它是 LinkedBlockingQueue 元素从第一个(头)到最后一个(尾)的表示，以适当的顺序用方括号(“[]”)括起来，用“，”(逗号和空格)分隔。
下面的程序说明了 LinkedBlockingQueue 类的 toString()方法:
程序 1:
// Java Program Demonstrate toString()
// method of LinkedBlockingQueue
import java.util.concurrent.LinkedBlockingQueue;
public class GFG {
public static void main(String[] args)
{
// define capacity of LinkedBlockingQueue
int capacityOfQueue = 50;
// create object of LinkedBlockingQueue
LinkedBlockingQueue<Integer> linkedQueue
= new LinkedBlockingQueue<Integer>(capacityOfQueue);
// Add element to LinkedBlockingQueue
linkedQueue.add(2300);
linkedQueue.add(1322);
linkedQueue.add(8945);
linkedQueue.add(6512);
// toString() on linkedQueue
String queueRepresentation = linkedQueue.toString();
// print results
System.out.println("Queue Representation:");
System.out.println(queueRepresentation);
}
}
输出:
Queue Representation:
[2300, 1322, 8945, 6512]
// Java Program Demonstrate toString()
// method of LinkedBlockingQueue.
import java.util.concurrent.LinkedBlockingQueue;
public class GFG {
// create an Employee Object with
// position and salary as an attribute
public class Employee {
public String name;
public String position;
public String salary;
Employee(String name, String position, String salary)
{
this.name = name;
this.position = position;
this.salary = salary;
}
@Override
public String toString()
{
return "Employee [name=" + name + ", position="
+ position + ", salary=" + salary + "]";
}
}
// Main Method
public static void main(String[] args)
{
GFG gfg = new GFG();
gfg.stringRepresentation();
}
public void stringRepresentation()
{
// define capacity of LinkedBlockingQueue
int capacity = 50;
// create object of LinkedBlockingQueue
LinkedBlockingQueue<Employee> linkedQueue
= new LinkedBlockingQueue<Employee>(capacity);
Employee emp1 = new Employee("Aman", "Analyst", "24000");
Employee emp2 = new Employee("Sachin", "Developer", "39000");
// Add Employee Objects to linkedQueue
linkedQueue.add(emp1);
linkedQueue.add(emp2);
// toString() on linkedQueue
String queueRepresentation = linkedQueue.toString();
// print results
System.out.println("Queue Representation:");
System.out.println(queueRepresentation);
}
}
输出:
Queue Representation:
[Employee [name=Aman, position=Analyst, salary=24000], Employee [name=Sachin, position=Developer, salary=39000]]
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