Java 中的 LinkedBlockingDeque toString() 方法

toString() 方法返回当前集合的字符串表示形式。字符串表示形式包含一个由该集合的迭代器返回的元素列表，按顺序排列，用方括号 (“[]”) 括起来。相邻元素由字符 “, “ (逗号和空格)隔开。元素将按String.valueOf(Object)方法转换为字符串。

语法：

public String toString()

参数： 该方法不接受任何参数。

返回值： 该方法返回当前集合的字符串表示形式。

下面的程序演示了 LinkedBlockingDeque 的 toString() 方法：

程序 1:

// Java Program Demonstrate toString()
            // method of LinkedBlockingDeque

            import java.util.concurrent.LinkedBlockingDeque;
            import java.util.*;

            public class GFG {
                public static void main(String[] args)

                {

                    // create object of LinkedBlockingDeque
                    LinkedBlockingDeque<Integer> LBD
                        = new LinkedBlockingDeque<Integer>();

                    // Add numbers to end of LinkedBlockingDeque
                    LBD.add(7855642);
                    LBD.add(35658786);
                    LBD.add(5278367);
                    LBD.add(74381793);

                    // Print the queue
                    System.out.println("Linked Blocking Deque: " + LBD);

                    System.out.println("LBD in string " + LBD.toString());
                }
            }

Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793]
LBD in string [7855642, 35658786, 5278367, 74381793]

程序 2:

// Java Program Demonstrate toString()
            // method of LinkedBlockingDeque

            import java.util.concurrent.LinkedBlockingDeque;
            import java.util.*;

            public class GFG {
                public static void main(String[] args)

                {

                    // create object of LinkedBlockingDeque
                    LinkedBlockingDeque<String> LBD
                        = new LinkedBlockingDeque<String>();

                    // Add numbers to end of LinkedBlockingDeque
                    LBD.add("geeks");
                    LBD.add("sudo");
                    LBD.add("gate");
                    LBD.add("gopal");

                    // Print the queue
                    System.out.println("Linked Blocking Deque: " + LBD);

                    System.out.println("LBD in string " + LBD.toString());
                }
            }

Linked Blocking Deque: [geeks, sudo, gate, gopal]
LBD in string [geeks, sudo, gate, gopal]

参考： https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/LinkedBlockingDeque.html#toString–