示例3:查找子字符串在字符串中的索引位置 Stringstr="Hello World";intindex=str.indexOf("World");System.out.println("The index of 'World' in the string is: "+index); 1. 2. 3. 输出结果为: The index of 'World' in the string is: 6 1. 示例4:从指定索引位置开始查找子字符串在字符串中...
Java Copy输出:String contains = GeeksForGeeks index of string "For" = 5 Java Copy例2: 当通过的子串在序列中存在,但是搜索的索引大于子串的索引。// Java program to demonstrate // the indexOf() Method. class GFG { public static void main(String[] args) { // create a StringBuilder object ...
IndexOf Method Reference Feedback Definition Namespace: Java.Lang Assembly: Mono.Android.dll Overloads 展開資料表 IndexOf(String, Int32) Returns the index within this string of the first occurrence of the specified substring, starting at the specified index. IndexOf(String) Returns the...
text/java 复制 this.codePointAt(k) == ch </blockquote> is true. In either case, if no such character occurs in this string, then -1 is returned. The String is searched backwards starting at the last character. Java documentation for java.lang.String.lastIndexOf(int). Portions of ...
TheindexOf()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. Syntax publicintindexOf(Objectitem) Parameter Values ParameterDescription itemRequired. The item to search for in the list. ...
More Java Courses IndexOf(String substring) This method returns the index of the first character of the substring passed as parameter to it. If the specified substring is not present in the string, the returned index would be -1. IndexOf(String substring, int fromindex) ...
TheindexOf()method returns the position of the first occurrence of specified character(s) in a string. Tip:Use thelastIndexOfmethod to return the position of thelastoccurrence of specified character(s) in a string. Syntax One of the following: ...
EN簡單的Java對象(Plain Ordinary Java Objects)實際就是普通JavaBeans,使用POJO名稱是為了避免和EJB混淆...
JavaInt16Array Constructors Methods Clear CopyFrom CopyTo CreateMarshaledValue GetElements IndexOf JavaInt32Array JavaInt64Array JavaInterfaceDefaultMethodAttribute JavaLibraryReferenceAttribute JavaObject JavaObjectArray<T> JavaObjectExtensions JavaPeerableExtensions JavaPrimitiveArray<T> JavaSByteArray JavaSingle...
public int indexOf(Object o) Java Copy参数: 该方法以Object o为参数,它是要搜索的元素。返回值: 该方法返回指定元素在这个列表中第一次出现的索引,如果这个列表不包含该元素,则返回-1。下面是说明 indexOf() 方法的例子。例1 :// Java program to demonstrate // indexOf() method // for Integer ...