NOTE:If we don't override thetoString()method and directly print the object, then it would print the object id that contains some hashcode. 注意:如果我们不重写toString()方法并直接打印对象,则它将打印包含一些哈希码的对象ID。 trim()方法 (trim()method) This method returns a string from which ...
public class StringMethod { static String str = "张三-李四-王五"; static String num = "42113132"; static String ch = "hello,world"; //字符串方法的操作均不影响原字符串 public static void main(String[] args) { // 1. startsWith() ——判断字符串是否以指定字符开头 boolean s1 = str.sta...
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 f
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...
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.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. ...
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]; ...
public class StringDemo { 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...
Java String contains() Method: Returns true if and only if this string contains the specified sequence of char values.