Code: stack=4, locals=2, args_size=1 0: new #2 // class java/lang/StringBuilder 3: dup 4: invokespecial #3 // Method java/lang/StringBuilder."<init>":()V 7: new #4 // class java/lang/String 10: dup 11: ldc #5 // String a 13: invokespecial #6 // Method java/lang/Strin...
newCapacity = minCapacity; }return(newCapacity <=0|| MAX_ARRAY_SIZE - newCapacity <0) ? hugeCapacity(minCapacity) : newCapacity; } 构造器 StringBuilder/StringBuffer的构造器完全相同 方法 StringBuilder&StringBuffer方法基本一致,StringBuffer中个别方法使用了synchronized修饰 voidgetChars(int srcBegin, int ...
* that suffices. * Will not return a capacity greater than {@codeMAX_ARRAY_SIZE} * unless the given minimum capacity is greater than that. * *@paramminCapacity the desired minimum capacity *@throwsOutOfMemoryError if minCapacity is less than zero or * greater than Integer.MAX_VALUE */pri...
Constructs a string builder with no characters in it and an initial capacity specified by the capacity argument. Parameters: capacity - the initial capacity. Throws: NegativeArraySizeException - if the capacity argument is less than 0.StringBuilder public StringBuilder(String str) Constructs a string...
* Constructs a string builder with no characters in it and an * initial capacity specified by the {@code capacity} argument. * * @param capacity the initial capacity. * @throws NegativeArraySizeException if the {@code capacity} * argument is less than {@code 0}. ...
*/publicStringBuilder(){super(16);}/** * Constructs a string builder with no characters in it and an * initial capacity specified by the {@code capacity} argument. * * @param capacity the initial capacity. * @throws NegativeArraySizeException if the {@code capacity} * argument is less ...
(1)用字符串做拼接,比较耗时并且也耗内存,而这种拼接操作又是比较常见的,为了解决这个问题,Java就提供了 一个字符串缓冲区类。StringBuffer供我们使用。 (2)StringBuffer的构造方法 A:StringBuffer() B:StringBuffer(int size) C:StringBuffer(String str) ...
(1)用字符串做拼接,比较耗时并且也耗内存,而这种拼接操作又是比较常见的,为了解决这个问题,Java就提供了 一个字符串缓冲区类。StringBuffer供我们使用。 (2)StringBuffer的构造方法 A:StringBuffer() B:StringBuffer(int size) C:StringBuffer(String str) ...
*/ public StringBuilder() { super(16); } /** * Constructs a string builder with no characters in it and an * initial capacity specified by the {@code capacity} argument. * * @param capacity the initial capacity. * @throws NegativeArraySizeException if the {@code capacity} * argument ...
StringBuilder构造方法 目前JAVA 17.0.8 提供的StringBuilder构造方法有四个,如下: publicStringBuilder(){super(16);}/***Constructsastringbuilderwithnocharactersinitandan*initialcapacityspecifiedbythe{@codecapacity}argument.**@paramcapacitytheinitialcapacity.*@throwsNegativeArraySizeExceptionifthe{@codecapacity}*...