在这个生态中,各个技术之间的依赖关系如下: StringBufferStringtemplateMapvaluesSpringServiceConfigcontainsuses StringBuffer在字符串替换中的有效应用,不仅提升了代码的可读性和维护性,还提升了性能,想要了解更多技术细节,请参考文档。
11.boolean contains(CharSequence s):当且仅当此字符串包含指定的 char 值序列 时,返回 true 代码语言:javascript 代码运行次数:0 运行 AI代码解释 String str1="helloworld";String str2="wo";boolean b4=str1.contains(str2);//true 12.int indexOf(String str):返回指定子字符串在此字符串中第一次出现...
因为StringBuffer的原型就是char[]字符数组，字符数组没有contains方法,String 有StringBuffer buffer = new StringBuffer ();buffer.toString().contains(...);public synchronized String toString() { return new String(value, 0, count);} ...
Returns a new String that contains a subsequence of characters currently contained in this sequence. StringtoString() Returns a string representing the data in this sequence. voidtrimToSize() Attempts to reduce storage used for the character sequence. Methods inherited from class java.lang.Object clon...
(str);}/** * Constructs a string builder that contains the same characters * as the specified {@code CharSequence}. The initial capacity of * the string builder is {@code 16} plus the length of the * {@code CharSequence} argument. * * @param seq the sequence to copy. */public...
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples. Java is a trademark or registered trademark of Oracle and/or its af...
extendsAbstractStringBuilderimplements java.io.Serializable,CharSquence{ //Constructs a string builder with no characters in it and an initial capacity of 16 characters. public StringBuilder(){ super(16);//这是初始化,初始为一个16个字符的字符串。
一、JAVA的API及Object类 1.API 概念: Java 的API(API: Application(应用) Programming(程序) Interface(接口)) JavaAPI就是JDK中提供给我们使用的类,这些类将底层的代码实现封装了起来,我们不需要关心这些类是如何实现的,只需要学习这些类如何使用即可。
(5)contains(CharSequence s) 当且仅当此字符串包含指定的 char 值序列时,返回 true(6)endsWith(String suffix) 测试此字符串是否以指定的后缀结束(7)equals(String anString) 将此字符串与指定的字符串比较(8)format(String format, Object args) 使用指定的格式字符串和参数返回一个格式化字符串(9)indexOf(...
* Constructs a string builder that contains the same characters * as the specified {@codeCharSequence}. The initial capacity of * the string builder is {@code16} plus the length of the * {@codeCharSequence} argument. * *@paramseq the sequence to copy. ...