// Calling Peek() method on empty stack // will throw InvalidOperationException. Console.WriteLine("Element at the top is : "+myStack.Peek()); } } 运行时错误: 未处理的异常:System.InvalidOperationException:堆栈为空。 参考: https://docs.microsoft.com/en-us/dotnet/api/system.collections.sta...
This method is similar to thePopmethod, butPeekdoes not modify theStack. nullcan be pushed onto theStackas a placeholder, if needed. To distinguish between a null value and the end of the stack, check theCountproperty or catch theInvalidOperationException, which is thrown when theStackis empty...
stack中.peek 与 .pop 的区别 stack.peek与stack.pop均可以把栈的数据进行弹出 相同点:stack.peek与stack.pop都弹出栈顶的值; 不同点:但是stack.peek在弹出数据的时候不改变栈的值(不删除栈顶的值),stack.pop在弹出数据的时候会把栈顶的值删除。 总结: 当我们只需要取出栈顶的元素进行处理(或者说我们需要先...
C# Stack.Peek() MethodThis is a method of 'Stack' class, it is used to get the element from top of stack without removing it.Syntaxobject Peek(); Parameter(s)None Return ValueReturn element from top of stack without removing it.
method and the// constructor that accepts an IEnumerable<T>.Stack<string> stack2 =newStack<string>(numbers.ToArray()); Console.WriteLine("\nContents of the first copy:");foreach(stringnumberinstack2 ) { Console.WriteLine(number); }// Create an array twice the size of the stack and ...
Stack peek() Method in Java Java 中的 java.util.Stack.peek() 方法用于检索或获取 Stack 的第一个元素或存在于 Stack 顶部的元素。检索到的元素不会从堆栈中删除或移除。 语法: STACK.peek() Parameters:该方法不带任何参数。 返回值:该方法返回堆栈顶部的元素,否则如果堆栈为空,则返回NULL。
Total number of elements in the Stack are : 6 示例2: // C# code to illustrate the// Stack.PeekMethodusingSystem;usingSystem.Collections;classGFG{// Driver codepublicstaticvoidMain(){// Creating a StackStack myStack =newStack();// Displaying the top element of Stack// without removing it...
Stack Methods TwitterLinkedInFacebookEmail Reference Feedback Definition Namespace: Java.Util Assembly: Mono.Android.dll Looks at the object at the top of this stack without removing it from the stack. C# [Android.Runtime.Register("peek","()Ljava/lang/Object;","GetPeekHandler")]publicvirtualJa...
The Stack.Peek() method in C# is used to return the object at the top of the Stack without removing it. Syntax The syntax is as follows − public virtual object Peek (); Advertisement - This is a modal window. No compatible source was found for this media. Example Let us now see ...
stackvariable.Peek( ) Return Value Object Description Returns the first item in the stack as an Object, but does not remove it from the stack Programming Tips and Gotchas The Peek method is similar to the Stack object’s Pop method, except that it leaves the stack intact. ...