Java 中的堆栈添加(对象)方法，示例
原文:https://www . geesforgeks . org/stack-addobject-method-in-Java-with-example/
堆栈类的 add(Object) 方法将指定的元素追加到该堆栈的末尾。
语法:
boolean add(Object element)
参数:该函数接受单个参数元素，如上语法所示。由该参数指定的元素被追加到堆栈的末尾。
返回值:此方法成功执行后返回真，否则假。
下面的程序说明了 Java . util . stack . add(Object element)方法的工作原理:
例 1:
// Java code to illustrate boolean add(Object element)
import java.util.*;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<String> stack
= new Stack<String>();
// Use add() method
// to add elements in the Stack
stack.add("Geeks");
stack.add("for");
stack.add("Geeks");
stack.add("10");
stack.add("20");
// Output the present Stack
System.out.println("The Stack is: "
+ stack);
// Adding new elements to the end
stack.add("Last");
stack.add("Element");
// Printing the new Stack
System.out.println("The new Stack is: "
+ stack);
}
}
Output:
The Stack is: [Geeks, for, Geeks, 10, 20]
The new Stack is: [Geeks, for, Geeks, 10, 20, Last, Element]
例 2:
// Java code to illustrate
// boolean add(Object element)
import java.util.*;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<Integer> stack
= new Stack<Integer>();
// Use add() method
// to add elements in the Stack
stack.add(10);
stack.add(20);
stack.add(30);
stack.add(40);
stack.add(50);
// Output the present Stack
System.out.println("The Stack is: "
+ stack);
// Adding new elements to the end
stack.add(100);
stack.add(200);
// Printing the new Stack
System.out.println("The new Stack is: "
+ stack);
}
}
Output:
The Stack is: [10, 20, 30, 40, 50]
The new Stack is: [10, 20, 30, 40, 50, 100, 200]
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