Returns a string representing the data in this sequence. void trimToSize() Attempts to reduce storage used for the character sequence. Methods inherited from class java.lang.Object clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait Methods inherited from interface ...
Java documentation for java.lang.StringBuilder.insert(int, char[]). Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License. See also ValueOf(Char[]) Applies...
The methods * are synchronized where necessary so that all the operations on any * particular instance behave as if they occur in some serial order * that is consistent with the order of the method calls made by each of * the individual threads involved. StringBuilder 代码语言:javascript 代码...
2. StringBuffer 源码中注释 * A thread-safe, mutable sequence of characters.*A string buffer is like a {@link String}, but can be modified.*The principal operations on a {@code StringBuffer} are the*{@code append} and {@code insert} methods, which are*overloaded so as to accept data...
//StringBuilder class//java.lang.StringBuilder//methods: .append() .toString()//importjava.util.Scanner;publicclassStrBuilder {publicstaticvoidmain(String[] args) { Scanner userInput=newScanner(System.in); StringBuilder builder=newStringBuilder(); ...
public class StringMethodsTest { @Test public void test1() { String s1 = " Hello, World! "; System.out.println("字符串的长度是:" + s1.length()); //输出 21 System.out.println("字符串中第四个字符是:" + s1.charAt(4)); //输出 e System.out.println("字符串是否为空?" + s1....
一、Java String 类——String字符串常量 字符串广泛应用 在Java编程中,在 Java 中字符串属于对象,Java 提供了String 类来创建和操作字符串。 需要注意的是,String的值是不可变的,这就导致每次对String的操作都会生成新的String对象,这样不仅效率低下,而且大量浪费有限的内存空间。我们来看一下这张对String操作时内...
+4 only because I would go a bit further and make the append and appendLine methods return the instance of string builder itself. That way you could write the concatenation liek this: sb.append("Blah").append("blah"); This would save typing and would looks better :) October 23, 2011...
* it is recommended that this class be used in preference to * StringBuffer as it will be faster under most implementations. * * The principal operations on a StringBuilder are the * append and insert methods, which are * overloaded so as to accept data of any type. Each effectively...
Java documentation for java.lang.StringBuilder.append(java.lang.CharSequence, int, int). Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License. Applies to .NE...