在JDK6及之前版本,字符串常量池是放在Perm Gen区(也就是方法区)中的,StringTable的长度是固定的1009;在JDK7版本中,字符串常量池被移到了堆中,StringTable的长度可以通过-XX:StringTableSize=66666参数指定。至于JDK7为什么把常量池移动到堆上实现,原因可能是由于方法区的内存空间太小且不方便扩展,而堆的内存空间...
0:ldc#2 // String abc2:astore_13:aload_14:astore_25:getstatic#3 // Field java/lang/System.out:Ljava/io/PrintStream;8:aload_19:aload_210:if_acmpne1713:iconst_114:goto1817:iconst_018:invokevirtual#4 // Method java/io/PrintStream.println:(Z)V21:ldc#2 // String abc23:astore_1 在21行...
public class StringAsParamOfMethodDemo { public static void main(String[] args) { StringAsParamOfMethodDemo StringAsParamOfMethodDemo = new StringAsParamOfMethodDemo(); StringAsParamOfMethodDemo.testA(); } private void testA() { String originalStr = "original"; System.out.println("Test A B...
因为Sting是这样定义的:public final class String extends Object,里边有final关键字,所以不能被继承。 1、在Java中,只要是被定义为final的类,也可以说是被final修饰的类,就是不能被继承的。 2、final是java中的一个关键字,可以用来修饰变量、方法和类。用关键词final修饰的域成为最终域。用关键词final修饰的变...
在jdk7中,StringTable的长度默认值是60013,StringTablesize设置没有要求 在JDK8中,设置StringTable长度的话,1009是可以设置的最小值 String的内存分配 在Java语言中有8种基本数据类型和一种比较特殊的类型String。这些类型为了使它们在运行过程中速度更快、更节省内存,都提供了一种常量池的概念。
* @return a string representation of the argument in base 10.//返回:以10为基数的参数的字符串表示形式。 */ @IntrinsicCandidate public static String toString(int i) { int size = stringSize(i); if (COMPACT_STRINGS) { byte[] buf = new byte[size]; ...
The length() of a String object returns the length of this string. Java - String length() Method example . What is the size of String in Java , How do I get the length of a string? The length of java string is same...
For additional information on string concatenation and conversion, see The Java™ Language Specification. Unless otherwise noted, passing a null argument to a constructor or method in this class will cause a NullPointerException to be thrown. A String represents a string in the UTF-16 format...
Integer.ToUnsignedString Method Reference Feedback Definition Namespace: Java.Lang Assembly: Mono.Android.dll Overloads 展開表格 ToUnsignedString(Int32, Int32) Returns a string representation of the first argument as an unsigned integer value in the radix specified by the second argument. ...
Java.Lang Assembly: Mono.Android.dll Overloads 展开表 Append(String, Int32, Int32) Append(Char[], Int32, Int32) Adds the specified sequence of characters to the end of this buffer. Append(ICharSequence, Int32, Int32) Added in 1. ...