程序1: // Java code to show the implementation of// indexOf method in list interfaceimportjava.util.*;publicclassGfG{// Driver codepublicstaticvoidmain(String[]args){// Initializing a list of type LinkedlistList<
// Java程序演示// indexOf() 方法// 对于整数值importjava.util.*;publicclassGFG1{publicstaticvoidmain(String[]argv)throwsException{try{// 创建AbstractList对象AbstractListarrlist1=newArrayList();// 填充arrlist1arrlist1.add(10);arrlist1.add(20);arrlist1.add(30);arrlist1.add(40);arrlist1....
The indexOf() method returns the position of the first occurrence of a value in the list. If the item is not found in the list then it returns -1.Syntaxpublic int indexOf(Object item)Parameter ValuesParameterDescription item Required. The item to search for in the list....
importjava.util.ArrayList;importjava.util.List;publicclassListExample{publicstaticvoidmain(String[]args){List<String>list=newArrayList<>();list.add("apple");list.add("banana");list.add("orange");intindex=list.indexOf("banana");System.out.println("The position of 'banana' is: "+index);}}...
java.util.ArrayList.indexOf(Object) 方法返回指定元素的第一个匹配项的索引在此列表中，或者-1，如果此列表中不包含该元素。声明 以下是java.util.ArrayList.indexOf()方法的声明 public int indexOf(Object o)参数 o -- 要搜索的元素。返回值 此方法返回指定元素的第一个匹配项的索引在此列表中...
在上面的代码中,我们通过循环遍历List,逐个比较元素是否等于目标元素,直到找到目标元素为止,然后输出目标元素的下标。 序列图 下面是一个获取List下标的序列图示例: loopMethodindexOfMethodListClientloopMethodindexOfMethodListClient创建List对象调用indexOf方法返回元素下标循环遍历List返回目标元素下标返回元素下标 ...
JavaList.LastIndexOf(Object) MethodReference Feedback DefinitionNamespace: Android.Runtime Assembly: Mono.Android.dll C# Copy public virtual int LastIndexOf (object item); Parameters item Object Returns Int32 Remarks Portions of this page are modifications based on work created and shared by...
indexOf() Return Value returns the position of the specified element from the arraylist Note: If the specified element doesn't exist in the list, theindexOf()method returns-1. Example 1: Get the Index of ArrayList Element importjava.util.ArrayList;classMain{publicstaticvoidmain(String[] args...
StringBuilder.IndexOf Method Reference Feedback Definition Namespace: Java.Lang Assembly: Mono.Android.dll Overloads 展開資料表 IndexOf(String, Int32) Searches for the index of the specified character. IndexOf(String) Searches for the first index of the specified character. ...
// Java code to illustrate indexOf() importjava.io.*; importjava.util.LinkedList; publicclassLinkedListDemo { publicstaticvoidmain(String args[]) { // Creating an empty LinkedList LinkedList<String> list =newLinkedList<String>(); // Use add() method to add elements in the list ...