*/privatetransientchar[] toStringCache;/** use serialVersionUID from JDK 1.0.2 for interoperability */staticfinallongserialVersionUID=3388685877147921107L;/** * Constructs a string buffer with no characters in it and an * initial capacity of 16 characters. */publicStringBuffer(){super(16); } }...
Code: stack=2, locals=5, args_size=1 0: ldc #2 // String a 2: astore_1 3: ldc #3 // String b 5: astore_2 6: ldc #4 // String ab 8: astore_3 9: new #5 // class java/lang/StringBuilder 12: dup 13: invokespecial #6 // Method java/lang/StringBuilder."<init>":()V...
* execution of the {@code append} method. Then the character at * index k in the new character sequence is equal to the character * at index k in the old character sequence, if k is less * than n; otherwise, it is equal to the character at index * k-n in the argument {@code ...
Java 中 String 是 immutable(不可变)的。 String 类的包含如下定义: /** The value is used for character storage. */privatefinalcharvalue[];/** The offset is the first index of the storage that is used. */privatefinalintoffset;/** The count is the number of characters in the String. *...
Java中StringBuilder的清空方法比較 大家好,又见面了,我是全栈君,祝每个程序员都可以多学几门语言。 StringBuilder 没有提供clear或empty方法。 清空有3种方法: 1)新生成一个,旧的由系统自己主动回收 2)使用delete 3)使用setLength 将三种方法循环1000万次,代码:...
JAVA异常是在java程序运行的时候遇到非正常的情况而创建的对,它封装了异常信息。java异常的根类为java.lang.Throwable,整个类有两个直接子类java.lang.Error和java.lang.Exception。 Error是程序本身无法恢复的严重错误,一般是虚拟机或者系统运行出现错误,和程序无关。Exception则表示可以被程序捕获并处理的异常错误。
Serializable: Serializability of a class is enabled by the class implementing the java.io.Serializable interface. AbstractStringBuilder: A MUTABLE SEQUENCE of characters. Implements a modifiable string. At any point in time it contains some particular sequence of characters, but the length and content...
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...
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中sout()输出时,默认会加上toString() String str = "小红"; //System.out.println(str);输出的是一样的效果 System.out.println(str.toString()); String str2[] = {"1","2","3","4"}; System.out.println(str2.toString()); /*;在输出的时候,默认是使用toString()方...