正文 1 可以使用String contains方法。java在contains()方法是判断字符串中是否有子字符串。当且仅当此字符串包含指定的char值序列,如果有则返回true,如果没有则返回false。如:if(map_string.contains("name")){System.out.println("找到了name的key");}if(map_string.contains("password")){System.out.pri...
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
The given string is: welcome to w3resource Characters to find in the main string are: tower The smallest window which contains the finding characters is : to w3re Flowchart: Java Code Editor: Improve this sample solution and post your code through Disqus Previous:Write a Java program to match...
Allocates a new String so that it represents the sequence of characters currently contained in the character array argument. String(char[] value, int offset, int count) Allocates a new String that contains characters from a subarray of the character array argument. String(int[] codePoints, ...
方法二:使用contains方法 另一种常见的方法是使用String类的contains方法。该方法返回一个布尔值,表示字符串是否包含指定的字符序列。 下面是一个使用contains方法判断字符串中是否包含某个字符的示例代码: Stringstr="Hello World";charch='o';if(str.contains(Character.toString(ch))){System.out.println("字符串...
implements java.io.Serializable, Comparable<String>, CharSequence { /** The value is used for character storage. */ private final char value[]; /** Cache the hash code for the string */ private int hash; // Default to 0 /** use serialVersionUID from JDK 1.0.2 for interoperability *...
含有完全的字符串时才返回true。“当且仅当此字符串包含指定的 char 值序列时,返回 true”即对于指定的字符串要完全匹配,不可以有额外的字符。例:public static void main(String[] args){ String s = "my String is s";boolean result1 = s.contains("my name");boolean result2 = s....
contains()方法是确定给定字符的char值在本字符串中是否包含!事实上“c”的char值跟“C”的char值是不一样的
import java.lang.*; 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); ...
该方法定义在String.class类中 CharSequence定义的是一个boolean型的方法,为:public boolean contains(CharSequence s){ return indexOf (s.toString())>-1;而CharSequence为:public interface CharSequence { int length();char charAt(int index);CharSequence subSequence(int start, int end);publ...