Java String contains() 方法Java String类contains() 方法用于判断字符串中是否包含指定的字符或字符串。语法public boolean contains(CharSequence chars) 参数chars -- 要判断的字符或字符串。返回值如果包含指定的字符或字符串返回 true,否则返回 false。
contains方法是String类中的一个实例方法,其语法如下: publicbooleancontains(CharSequences) 1. 其中,参数s为要检查是否包含的字符串,返回值为boolean类型,表示是否包含。 contains方法的使用示例 下面我们通过一个简单的示例来演示contains方法的使用: publicclassContainsExample{publicstaticvoidmain(String[]args){String...
string.contains(CharSequence ch) Here,stringis anobjectof theStringclass. contains() Parameters Thecontains()method takes a single parameter. ch(charSequence) - a sequence of characters Note:AcharSequenceis a sequence of characters such as:String,CharBuffer,StringBufferetc. contains() Return Value ...
public int compareTo(String anotherString) { int len1 = value.length; int len2 = anotherString.value.length; int lim = Math.min(len1, len2); char v1[] = value; char v2[] = anotherString.value; int k = 0; while (k < lim) { char c1 = v1[k]; char c2 = v2[k]; if (...
public static void main(String[] args) { String str1 = "tutorials point", str2 = "http://"; CharSequence cs1 = "int"; // string contains the specified sequence of char values boolean retval = str1.contains(cs1); System.out.println("Method returns : " + retval); ...
StringmyStr="Hello";System.out.println(myStr.contains("Hel"));// trueSystem.out.println(myStr.contains("e"));// trueSystem.out.println(myStr.contains("Hi"));// false Try it Yourself » Definition and Usage Thecontains()method checks whether a string contains a sequence of characters...
String类实现了Serializable、CharSequence、Comparable接口; String实例的值是通过字符数组实现字符串存储的。 “+”连接符解析 “+”连接符的实现原理 Java语言为“+”连接符以及对象转换为字符串提供了特殊的支持。其中字符串连接是通过StringBuilder及其append方法实现的,对象转换字符串是通过toString方法实现的,toString方...
Returns true if and only if this string contains the specified sequence of char values. Contains(String) Returns true if and only if this string contains the specified sequence of char values.Contains(ICharSequence) Returns true if and only if this string contains the specified sequence of ...
public static void main(String[] args) { String str1 = "tutorials point", str2 = "http://"; CharSequence cs1 = "int"; // string contains the specified sequence of char values boolean retval = str1.contains(cs1); System.out.println("Method returns : " + retval); ...
String s=new String(chars); i nt len=s.length(); 2、charAt() 截取一个字符 例:char ch; ch="abc".charAt(1); 返回'b' 3、 getChars() 截取多个字符 例:String s="this is a demo of the getChars method."; char buf[]=new char[20]; ...