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java 程序基础试题



JVM ...................................................................................................................22
JVM ...........................................................................................................22
1. 线............................................................................................22
2.Java 线....................................................................................................23
3. 线............................................................................................24
4. 线............................................................................................................25
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Java 架构核心知点笔(+题java 程序基础试题+方向)V1.0
5. 线....................................................................................................25
6. 线享)................................................................................................26
JVM ...............................................................................................................29
1.Class ...........................................................................................................29
1.1 Java .............................................................................................30
1.2 Class ....................................................................................................30
2. 指令....................................................................................................................32
2.1 指令.................................................................................................32
2.2 指令.................................................................................................32
2.3 .....................................................................................................32
2.4 ............................................................................................ 33
2.5 指令.................................................................................................33
2.6 访.....................................................................................................33
2.7 ............................................................................................ 33
2.8 .................................................................................... 33
2.9 ............................................................................................ 33
2.10 ...................................................................................................33
2.11 ...................................................................................................34
2.12 ...................................................................................................34
2.13 ...................................................................................................34
2.14 ...........................................................................................................34
3. 机制....................................................................................................................34
4. ........................................................................................................................36
4.1 .................................................................................................36
4.2 .....................................................................................................37
5.Tomcat ...................................................................................................... 37
6. ................................................................................................................38
6.1 .....................................................................................................................38
6.2 .............................................................................................................38
6.3 .............................................................................................................39
6.4 引擎........................................................................ 40
. ..............................................................................................41
1.Java ................................................................................41
2. ........................................................................................................................41
3. ........................................................................................................41
3.1 略分........................................................................................ 42
3.2 式分........................................................................................ 43
3.3 线.....................................................................................................43
4. ................................................................................................................44
5.JAVA GC ........................................................................................ 45
Java ..................................................................................................45
2
1. ........................................................................................................................45
1.1 ................................................................................ 45
1.2 私有................................................................ 46
1.3 .................................................................................... 46
1.4 使............................................................................................ 47
1.5 使访小化........................................................................ 47
1.6 使小化.................................................................................................47
1.7 .................................................................................................47
1.8 .................................................................................................47
2. ................................................................................................................................ 47
2.1 使用........................................................................................ 48
2.2 null..................................................... 48
2.3 使异常........................................................................................ 48
3. ................................................................................................................48
...........................................................................................................................49
1. /.......................................................................................... 49
1.1 ............................................................................................................49
1.2 .................................................................................................................49
1.3 吐量.................................................................................................................49
1.4 .....................................................................................................................50
2. 手段....................................................................................................50
2.1 .....................................................................................................50
2.2 ............................................................................................ 50
2.3 ............................................................ 50
2.4 ............................................................................................ 51
2.4.1 /App............................................................................................. 51
2.4.2 CDN ................................................................................................. 51
2.4.3 ......................................................................................... 51
2.4.4 WEB .........................................................................................51
3 ........................................................................................................51
3.1 .....................................................................................................................51
3.1.1 ......................................................................... 52
3.1.2 使............................................................................. 52
3.1.3 ..................................................................... 52
3.2 .....................................................................................................................53
3.2.1 ................................................................. 53
3.2.2 ..................................................................................... 53
3.3 .....................................................................................................................53
3.4 .............................................................................................................54
3.4.1 ..................................................................................................54
3.4.2 ..................................................................................................54
3.4.3 ............................................................................................. 55
3
3.4.4 JVM...........................................................................................................55
3.4.5 GC .................................................................................................... 56
3.4.6 ..................................................................................................59
3.4.7 ......................................................................................... 59
JVM .Xmind................................................................................. 60
JVM 解析.......................................................................................................................61
1.Java 程?............................................................................................................... 62
2. JVM Class ?.................................................................. 64
3. Java 配。.................................................................................................................. 65
4.GC 什么 ? GC .......................................................................................... 67
5. Java ...............................................................................................67
6. ?( GC 法).................................... 67
7. 2 ....................................................... 69
8. 垃圾收器的本原理是么?垃圾收器可上回收什么
收? ...................................................................................................70
9. Java ......................................................................70
11. ............................................................................................................76
12. System.gc() Runtime.gc() ............................................................... 77
13. finalize() (finalization) ................77
14. null.......78
15. DGC)?的?................................................ 78
16. serialthroughput....................78
17. Java 收?............................................................ 78
18. Java Minor GC Major GC............................... 79
19. JVM 么?........................................................................... 79
20. Java 些?....................................................................................80
21. 些?........................................................................... 81
22. ....................................................................................... 82
Java ....................................................................................................................... 83
Object ....................................................................................................................................... 83
equals ..................................................................................................................... 83
hashCode ............................................................................................................... 83
static ..........................................................................................................................................84
final ............................................................................................................................................85
String StringBuffer StringBuilder .....................................................................................85
................................................................................................................................... 86
....................................................................................................................................... 87
.......................................................................................................................87
........................................................................................................................................... 87
............................................................................................................................... 88
................................................................................................................................... 88
HashMap .......................................................................................................................... 89
4
.......................................................................................................................89
HashMap 原理............................................................................................91
HashMap HashTable ..............................................................................92
ConcurrentHashMap ...................................................................................................... 94
Base 1.7.................................................................................................................... 94
Base 1.8.................................................................................................................... 96
ArrayList ............................................................................................................................99
LinkedList ....................................................................................................................... 101
CopyOnWriteArrayList ................................................................................................. 104
......................................................................................................................................... 106
......................................................................................................................................... 108
饿 ............................................................................................................................. 108
.................................................................................................................108
.............................................................................................................109
线 ......................................................................................................................................... 110
................................................................................................................................. 110
.........................................................................................................................112
volatile .................................................................................................................................... 113
synchronized ..........................................................................................................................115
.........................................................................................................115
................................................................................................................................. 116
Lock ......................................................................................................................................... 116
.........................................................................................................................117
.....................................................................................................118
........................................................................................ 119
.........................................................................................................................119
................................................................................................................................. 120
................................................................................................................................. 120
..................................................................................................................................... 127
Java ..................................................................................................................... 128
1. ArrayList Vector .................................................................................. 128
2. ArrayList,Vector, LinkedList .................................. 129
3. (fail-fast) (fail-safe) ......................129
4. hashmap ...................................................................................................130
5. HashMap ?........................................................................................ 130
6. Hashmap 呢?.................................................................................. 130
7. ListMapSet 点?.................................... 131
8. Set 里的素是不能复的,那用什么法来区分复与否呢? ==
equals()? ?...................................................................................................132
9. (x.equals(y) == true)却可不同 hash code
?....................................................................................................................................... 132
10. heap stack .................................................................................... 132
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