Added in 1.0. Java documentation forjava.lang.StringBuffer. Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in the
1, StringBuffer 类的创建和使用 例如: StringBuffer 类对象的创建及使用 StringBufferDemo.java public class StringBufferDemo { StringBuffer strBuf1 = new StringBuffer("Hello world!"); // 声明、创建并初始化 StringBuffer 类的对象 strBuf1 StringBuffer strBuf2; // 声明 StringBuffer 类的对象 strBu...
importjava.util.HashMap;importjava.util.Map;publicclassApplication{publicstaticvoidmain(String[]args){Stringtemplate="Hello, {name}. Today is {day}.";Map<String,String>values=newHashMap<>();values.put("name","Alice");values.put("day","Monday");Stringresult=StringPlaceholderReplacer.replacePla...
public class StringBufferDemo03 { public static void main(String[] args) { // 创建对象 StringBuffer sb1 = new StringBuffer(); // 创建对象 sb1.append("hello").append("world").append("java"); System.out.println("sb1:"+sb1); //sb1:helloworldjava // public StringBuffer deleteCharAt(...
publicfinalclassStringBufferextendsAbstractStringBuilderimplementsjava.io.Serializable,CharSequence{...} StringBuffer类被final所修饰,因此不能被继承。 StringBuffer类继承于AbstractStringBuilder类。实际上,AbstractStringBuilder类具体实现了可变字符序列的一系列操作,比如:append()、insert()、delete()、replace()、charAt...
java.lang.StringBuffer代表可变的字符序列,可以对字符串内容进行增删。 很多方法与String相同,但StringBuffer是可变长度的。 StringBuffer是一个容器。 publicclassStringBuffer01{publicstaticvoidmain(String[] args){//老韩解读//1. StringBuffer 的直接父类 是 AbstractStringBuilder//2. StringBuffer 实现了 Seriali...
java学习之stringbuffer练习2,反转 packagecom.ifenx8.study;importjava.util.Scanner;publicclassDemo_4{/** 案例演示 * 需求:把字符串反转 举例:键盘录入"abc" 输出结果:"cba" 用StringBuffer的功能实现 */publicstaticvoidmain(String[]args){Scanner sc=newScanner(System.in);System.out.println("请输入一...
返回值类型 String,参数 String s3:在方法中用StringBuilder实现字符串的反转,并把结果转成String返回4:调用方法,用一个变量接收结果5:输出结果*/public class StringBuilderTest02 {public static void main(String[] args) {//键盘录入一个字符串,用 Scanner 实现Scanner sc = new Scanner(System.in);System....
publicclass 统计输入字符串中各种字符的个数 {publicstaticvoidmain(String[] args){Scannersc=newScanner(System.in); System.out.println("请输入一个字符串:");Stringnext=sc.next();intaa=0;//大写字母intbb=0;//小写字母intcc=0;//数字intdd=0;//其他char[] chars = next.toCharArray();for(inti...
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 clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait Methods inherited fr...