classMemory{publicstaticvoidmain(String[]args){//line 1int i=1;//line 2Object obj=newObject();//line 3Memory mem=newMemory();//Line 4mem.foo(obj);//Line 5}//Line 9privatevoidfoo(Object param){//line 6String str=param.toString();//line 7System.out.println(str);}//Line 8} ...
April 8, 2024Ribhu SharmaGST India, Informative GST Articles 4 Minutes Read In some cases, a registered person comes under an obligation to pay tax on a reverse charge basis. Table 4G in GSTR 9 encompasses details of such inward supplies which makes a registered person liable to pay tax ...
*/publicclassStringTest3{publicstaticvoidmain(String[]args){//使用Set保持着常量池引用,避免full gc回收常量池行为Set<String>set=newHashSet<String>();//在short可以取值的范围内足以让6MB的PermSize或heap产生OOM了。short i=0;while(true){set.add(String.valueOf(i++).intern());}}} 结果: 代码语...
8 0x0100 No subsetting: When this bit is set, the font must not be subsetted prior to embedding. Other embedding restrictions specified in bits 0 – 3 and bit 9 also apply. 9 0x0200 Bitmap embedding only: When this bit is set, only bitmaps contained in the font may be embedded. No...
type_str: 'm3u8', })) break } } } catch (e) { log.log(e.toString()) 40 changes: 27 additions & 13 deletions 40 electron/main/utils.ts Original file line numberDiff line numberDiff line change @@ -1,8 +1,9 @@ import fs from 'fs' import {Transform } from 'stream' import...
如果你使用的 JDK 8u20,那么可以使用下面的 JVM 参数开启 G1 垃圾回收器,并开启字符串去重功能 -XX:+UseG1GC -XX:+UseStringDeduplication 原理是让多个字符串对象引用同一个 char[] 来达到节省内存的目的 特点 由G1 垃圾回收器在 minor gc 阶段自动分析优化,不需要程序员自己干预 ...
非标准$1, $2, $3, $4, $5, $6, $7, $8, $9 属性是包含括号子串匹配的正则表达式的静态和只读属性 这些属性可以在String.replace 方法中替换字符串. 在这种情况下, 不用在前面加上 RegExp 指的是与正则表达式匹配的第一个 子匹配(以括号为标志)字符串,以此类推,RegExp.$2,RegExp.$3,…RegExp...
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String 在 jdk8 及以前内部定义了private final char[] value用于存储字符串数据。 JDK9 时改为 byte[] 为什么JDK9改变了结构⟳ 官方说明:http://openjdk.java.net/jeps/254 String 类的当前实现将字符存储在 char 数组中,每个字符使用两个字节(16 位)。从许多不同的应用程序收集的数据表明,字符串是堆使用...
jdk8及以前,内部定义了final char[] value用于存储字符串数据 jdk9类型更改:private final char value[];–>private final byte[] value; char数组每个字符占两个字节16位,String是堆空间的主要部分,大部分是拉丁字符,占一个字节,节省空间 String再也不用char[] 来存储,改成了byte [] 加上编码标记 ...