Skip to content

J
java1

御承扬 / java1

通知 2
Star 0
Fork 0
J
java1

前往新版Gitcode，体验更适合开发者的 AI 搜索 >>

提交 268080e9 编写于 作者: 御 御承扬
浏览文件
操作

Update

上级 805f753e
隐藏空白更改
内联 并排
Showing with 263 addition and 85 deletion
.idea/inspectionProfiles/Project_Default.xml
浏览文件 @ 268080e9
......@@ -82,6 +82,12 @@
<option name="CHECK_DUPLICATE_KEYS" value="true" />
<option name="CHECK_DUPLICATE_KEYS_WITH_DIFFERENT_VALUES" value="true" />
</inspection_tool>
<inspection_tool class="Duplicates" enabled="true" level="WEAK WARNING" enabled_by_default="true">
<Java>
<minSize>57</minSize>
<isEnabled>true</isEnabled>
</Java>
</inspection_tool>
<inspection_tool class="EmptyDirectory" enabled="true" level="WARNING" enabled_by_default="true" />
<inspection_tool class="EmptyInitializer" enabled="true" level="WARNING" enabled_by_default="true" />
<inspection_tool class="EqualsAndHashcode" enabled="true" level="WARNING" enabled_by_default="true" />
......
.idea/workspace.xml
浏览文件 @ 268080e9
......@@ -2,13 +2,10 @@
<project version="4">
<component name="ChangeListManager">
<list default="true" id="4e65795a-6659-4829-a5e6-120206826e71" name="Default Changelist" comment="">
<change afterPath="$PROJECT_DIR$/.idea/markdown-navigator.xml" afterDir="false" />
<change afterPath="$PROJECT_DIR$/.idea/markdown-navigator/profiles_settings.xml" afterDir="false" />
<change afterPath="$PROJECT_DIR$/src/多线程/InterruptedSwing.java" afterDir="false" />
<change afterPath="$PROJECT_DIR$/src/多线程/Priority.java" afterDir="false" />
<change afterPath="$PROJECT_DIR$/src/多线程/PriorityTest.java" afterDir="false" />
<change afterPath="$PROJECT_DIR$/src/多线程/SynchronizedTest.java" afterDir="false" />
<change beforePath="$PROJECT_DIR$/.idea/inspectionProfiles/Project_Default.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/inspectionProfiles/Project_Default.xml" afterDir="false" />
<change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
<change beforePath="$PROJECT_DIR$/src/多线程/ThreadSafeTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/多线程/ThreadSafeTest.java" afterDir="false" />
<change beforePath="$PROJECT_DIR$/笔记/多线程.md" beforeDir="false" afterPath="$PROJECT_DIR$/笔记/多线程.md" afterDir="false" />
</list>
<ignored path="$PROJECT_DIR$/out/" />
......@@ -40,12 +37,12 @@
</component>
<component name="FileEditorManager">
<leaf SIDE_TABS_SIZE_LIMIT_KEY="375">
<file pinned="false" current-in-tab="true">
<file pinned="false" current-in-tab="false">
<entry file="file://$PROJECT_DIR$/笔记/多线程.md">
<provider selected="true" editor-type-id="split-provider[text-editor;MarkdownPreviewEditor]">
<state split_layout="SPLIT">
<first_editor relative-caret-position="490">
<caret line="460" column="7" lean-forward="true" selection-start-line="460" selection-start-column="7" selection-end-line="460" selection-end-column="7" />
<first_editor relative-caret-position="515">
<caret line="567" selection-start-line="567" selection-end-line="567" />
<folding>
<element signature="e#1766#1767#0" expanded="true" />
<element signature="e#1806#1807#0" expanded="true" />
......@@ -66,24 +63,11 @@
</provider>
</entry>
</file>
<file pinned="false" current-in-tab="false">
<entry file="file://$PROJECT_DIR$/src/多线程/Priority.java">
<file pinned="false" current-in-tab="true">
<entry file="file://$PROJECT_DIR$/src/多线程/SynchronizedTest.java">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="304">
<caret line="29" column="1" lean-forward="true" selection-start-line="15" selection-end-line="29" selection-end-column="1" />
<folding>
<element signature="e#539#540#0" expanded="true" />
<element signature="e#588#589#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
</file>
<file pinned="false" current-in-tab="false">
<entry file="file://$PROJECT_DIR$/src/多线程/PriorityTest.java">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="600">
<caret line="24" column="1" lean-forward="true" selection-start-line="2" selection-end-line="24" selection-end-column="1" />
<caret line="36" column="44" lean-forward="true" selection-start-line="36" selection-start-column="44" selection-end-line="36" selection-end-column="44" />
</state>
</provider>
</entry>
......@@ -128,8 +112,6 @@
<component name="IdeDocumentHistory">
<option name="CHANGED_PATHS">
<list>
<option value="$PROJECT_DIR$/src/Swing程序设计/JLabelTest.java" />
<option value="$PROJECT_DIR$/src/测试代码专用/Try.java" />
<option value="$PROJECT_DIR$/src/Swing程序设计/DrawIcon.java" />
<option value="$PROJECT_DIR$/src/Swing程序设计/MyImageIcon.java" />
<option value="$PROJECT_DIR$/src/Swing程序设计/JTextFieldTest.java" />
......@@ -178,6 +160,8 @@
<option value="$PROJECT_DIR$/src/多线程/InterruptedSwing.java" />
<option value="$PROJECT_DIR$/src/多线程/Priority.java" />
<option value="$PROJECT_DIR$/src/多线程/PriorityTest.java" />
<option value="$PROJECT_DIR$/src/多线程/ThreadSafeTest.java" />
<option value="$PROJECT_DIR$/src/多线程/SynchronizedTest.java" />
<option value="$PROJECT_DIR$/笔记/多线程.md" />
</list>
</option>
......@@ -206,7 +190,32 @@
<navigator proportions="" version="1">
<foldersAlwaysOnTop value="true" />
</navigator>
<panes />
<panes>
<pane id="ProjectPane">
<subPane>
<expand>
<path>
<item name="IDEA_JAVA" type="b2602c69:ProjectViewProjectNode" />
<item name="IDEA_JAVA" type="462c0819:PsiDirectoryNode" />
</path>
<path>
<item name="IDEA_JAVA" type="b2602c69:ProjectViewProjectNode" />
<item name="IDEA_JAVA" type="462c0819:PsiDirectoryNode" />
<item name="src" type="462c0819:PsiDirectoryNode" />
</path>
<path>
<item name="IDEA_JAVA" type="b2602c69:ProjectViewProjectNode" />
<item name="IDEA_JAVA" type="462c0819:PsiDirectoryNode" />
<item name="src" type="462c0819:PsiDirectoryNode" />
<item name="多线程" type="462c0819:PsiDirectoryNode" />
</path>
</expand>
<select />
</subPane>
</pane>
<pane id="Scope" />
<pane id="PackagesPane" />
</panes>
</component>
<component name="PropertiesComponent">
<property name="ASKED_SHARE_PROJECT_CONFIGURATION_FILES" value="true" />
......@@ -229,7 +238,7 @@
<property name="project.structure.proportion" value="0.15" />
<property name="project.structure.side.proportion" value="0.2" />
<property name="run.code.analysis.last.selected.profile" value="pProject Default" />
<property name="settings.editor.selected.configurable" value="configurable.group.appearance" />
<property name="settings.editor.selected.configurable" value="project.scopes" />
</component>
<component name="RecentsManager">
<key name="CopyFile.RECENT_KEYS">
......@@ -253,7 +262,7 @@
</list>
</option>
</component>
<component name="RunManager" selected="应用程序.PriorityTest">
<component name="RunManager" selected="应用程序.SynchronizedTest">
<configuration name="InterruptedSwing" type="Application" factoryName="应用程序" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="多线程.InterruptedSwing" />
<module name="IDEA_JAVA" />
......@@ -293,8 +302,8 @@
<option name="Make" enabled="true" />
</method>
</configuration>
<configuration name="SleepMethodTest" type="Application" factoryName="应用程序" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="多线程.SleepMethodTest" />
<configuration name="SynchronizedTest" type="Application" factoryName="应用程序" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="多线程.SynchronizedTest" />
<module name="IDEA_JAVA" />
<extension name="coverage">
<pattern>
......@@ -306,8 +315,8 @@
<option name="Make" enabled="true" />
</method>
</configuration>
<configuration name="SwingAndThread" type="Application" factoryName="应用程序" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="多线程.SwingAndThread" />
<configuration name="ThreadSafeTest" type="Application" factoryName="应用程序" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="多线程.ThreadSafeTest" />
<module name="IDEA_JAVA" />
<extension name="coverage">
<pattern>
......@@ -321,11 +330,11 @@
</configuration>
<recent_temporary>
<list>
<item itemvalue="应用程序.SynchronizedTest" />
<item itemvalue="应用程序.ThreadSafeTest" />
<item itemvalue="应用程序.PriorityTest" />
<item itemvalue="应用程序.InterruptedSwing" />
<item itemvalue="应用程序.JoinTest" />
<item itemvalue="应用程序.SleepMethodTest" />
<item itemvalue="应用程序.SwingAndThread" />
</list>
</recent_temporary>
</component>
......@@ -406,21 +415,8 @@
<workItem from="1563351572097" duration="4795000" />
<workItem from="1563364743765" duration="95000" />
<workItem from="1563364867577" duration="289000" />
<workItem from="1563365858290" duration="1930000" />
</task>
<task id="LOCAL-00006" summary="Update">
<created>1560003182152</created>
<option name="number" value="00006" />
<option name="presentableId" value="LOCAL-00006" />
<option name="project" value="LOCAL" />
<updated>1560003182152</updated>
</task>
<task id="LOCAL-00007" summary="Update">
<created>1560263227095</created>
<option name="number" value="00007" />
<option name="presentableId" value="LOCAL-00007" />
<option name="project" value="LOCAL" />
<updated>1560263227095</updated>
<workItem from="1563365858290" duration="1971000" />
<workItem from="1563411760601" duration="4888000" />
</task>
<task id="LOCAL-00008" summary="Update">
<created>1560351066854</created>
......@@ -751,11 +747,25 @@
<option name="project" value="LOCAL" />
<updated>1563354040673</updated>
</task>
<option name="localTasksCounter" value="55" />
<task id="LOCAL-00055" summary="Update">
<created>1563367806675</created>
<option name="number" value="00055" />
<option name="presentableId" value="LOCAL-00055" />
<option name="project" value="LOCAL" />
<updated>1563367806677</updated>
</task>
<task id="LOCAL-00056" summary="Update">
<created>1563415917057</created>
<option name="number" value="00056" />
<option name="presentableId" value="LOCAL-00056" />
<option name="project" value="LOCAL" />
<updated>1563415917065</updated>
</task>
<option name="localTasksCounter" value="57" />
<servers />
</component>
<component name="TimeTrackingManager">
<option name="totallyTimeSpent" value="207436000" />
<option name="totallyTimeSpent" value="212365000" />
</component>
<component name="TodoView" selected-index="3">
<todo-panel id="selected-file">
......@@ -778,6 +788,7 @@
<window_info id="Capture Tool" order="5" />
<window_info id="Favorites" order="6" side_tool="true" weight="0.3295302" />
<window_info id="设计师" order="7" />
<window_info anchor="bottom" auto_hide="true" id="Duplicates" weight="0.32972974" />
<window_info anchor="bottom" auto_hide="true" id="Run" order="0" weight="0.3716216" />
<window_info anchor="bottom" auto_hide="true" id="Version Control" order="1" weight="0.3189189" />
<window_info anchor="bottom" auto_hide="true" id="Inspection Results" order="2" weight="0.32916668" />
......@@ -863,20 +874,6 @@
<option name="FILTER_TARGETS" value="false" />
</component>
<component name="editorHistoryManager">
<entry file="file://$PROJECT_DIR$/src/Swing程序设计/按钮1.jpg">
<provider selected="true" editor-type-id="images" />
</entry>
<entry file="file://$PROJECT_DIR$/src/Swing程序设计/JTextAreaTest.java">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="700">
<caret line="29" column="44" selection-start-line="29" selection-start-column="44" selection-end-line="29" selection-end-column="44" />
<folding>
<element signature="imports" expanded="true" />
<element signature="e#793#794#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/src/Swing程序设计/JButtonTest.java">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="1125">
......@@ -1290,27 +1287,30 @@
</entry>
<entry file="file://$PROJECT_DIR$/src/多线程/Priority.java">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="304">
<caret line="29" column="1" lean-forward="true" selection-start-line="15" selection-end-line="29" selection-end-column="1" />
<folding>
<element signature="e#539#540#0" expanded="true" />
<element signature="e#588#589#0" expanded="true" />
</folding>
<state relative-caret-position="675">
<caret line="29" column="1" selection-start-line="15" selection-end-line="29" selection-end-column="1" />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/src/多线程/PriorityTest.java">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="600">
<caret line="24" column="1" lean-forward="true" selection-start-line="2" selection-end-line="24" selection-end-column="1" />
<caret line="24" column="1" selection-start-line="2" selection-end-line="24" selection-end-column="1" />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/src/多线程/ThreadSafeTest.java">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="550">
<caret line="40" column="19" lean-forward="true" selection-start-line="40" selection-start-column="19" selection-end-line="40" selection-end-column="19" />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/笔记/多线程.md">
<provider selected="true" editor-type-id="split-provider[text-editor;MarkdownPreviewEditor]">
<state split_layout="SPLIT">
<first_editor relative-caret-position="490">
<caret line="460" column="7" lean-forward="true" selection-start-line="460" selection-start-column="7" selection-end-line="460" selection-end-column="7" />
<first_editor relative-caret-position="515">
<caret line="567" selection-start-line="567" selection-end-line="567" />
<folding>
<element signature="e#1766#1767#0" expanded="true" />
<element signature="e#1806#1807#0" expanded="true" />
......@@ -1330,6 +1330,13 @@
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/src/多线程/SynchronizedTest.java">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="304">
<caret line="36" column="44" lean-forward="true" selection-start-line="36" selection-start-column="44" selection-end-line="36" selection-end-column="44" />
</state>
</provider>
</entry>
</component>
<component name="masterDetails">
<states>
......@@ -1416,6 +1423,17 @@
</splitter-proportions>
</settings>
</state>
<state key="ScopeChooserConfigurable.UI">
<settings>
<splitter-proportions>
<option name="proportions">
<list>
<option value="0.2" />
</list>
</option>
</splitter-proportions>
</settings>
</state>
</states>
</component>
</project>
\ No newline at end of file
src/多线程/SynchronizedTest.java 0 → 100644
浏览文件 @ 268080e9
package 多线程;
// !/usr/bin/env jdk1.8
// encoding:utf-8
//@software:IntelliJ IDEA
//@pack:多线程
//@user:彭友聪
//@date:2019/07/18
//@time:上午 10:13
//@project:IDEA_JAVA
//@file:SynchronizedTest.java
//Author:御承扬
//email:2923616405@qq.com
public class SynchronizedTest implements Runnable {
private int num = 10;
public void run() {
while (true) {
synchronized (this) {
if (num > 0) {
try {
Thread.sleep( 100 );
} catch (Exception e) {
e.printStackTrace();
}
System.out.printf( "%s票数%d\n", Thread.currentThread().getName(), num );
num--;
}
else
break;
}
}
}
public static void main(String[] args) {
SynchronizedTest t = new SynchronizedTest();
Thread tA = new Thread( t,"线程一" );
Thread tB = new Thread( t,"线程二" );
Thread tC = new Thread( t,"线程三" );
Thread tD = new Thread( t,"线程四" );
// 启动线程
tA.start();
tB.start();
tC.start();
tD.start();
}
}
src/多线程/ThreadSafeTest.java
浏览文件 @ 268080e9
......@@ -32,14 +32,14 @@ public class ThreadSafeTest implements Runnable {
public static void main(String[] args) {
ThreadSafeTest t = new ThreadSafeTest();
Thread tA = new Thread( t,"线程一" );
Thread tB = new Thread( t,"线程二" );
Thread tC = new Thread( t,"线程三" );
Thread tD = new Thread( t,"线程四" );
Thread t1 = new Thread( t,"线程一" );
Thread t2 = new Thread( t,"线程二" );
Thread t3 = new Thread( t,"线程三" );
Thread t4 = new Thread( t,"线程四" );
// 启动线程
tA.start();
tB.start();
tC.start();
tD.start();
t1.start();
t2.start();
t3.start();
t4.start();
}
}
笔记/多线程.md
浏览文件 @ 268080e9
......@@ -458,4 +458,110 @@
}
}
}
```
\ No newline at end of file
```
## 六、线程的同步
* 线程的同步机制，是为了在多线程时，避免出现资源访问的冲突。
### 1、线程安全
* 线程安全问题主要考虑线程同时存取同一对象的数据。
* 实例：
```
public class ThreadSafeTest implements Runnable {
private int num = 10; // 设置当前票总数
public final void run() {
while (true) {
if (num > 0) {
try {
Thread.sleep( 100 );
} catch (Exception e) {
e.printStackTrace();
}
System.out.printf( "%s票数%d\n", Thread.currentThread().getName(), num );
num--;
}
}
}
public static void main(String[] args) {
ThreadSafeTest t = new ThreadSafeTest();
Thread tA = new Thread( t,"线程一" );
Thread tB = new Thread( t,"线程二" );
Thread tC = new Thread( t,"线程三" );
Thread tD = new Thread( t,"线程四" );
// 启动线程
tA.start();
tB.start();
tC.start();
tD.start();
}
}
// 输出结果：
线程二票数10
线程三票数10
线程四票数10
线程一票数10
线程二票数6
线程三票数5
线程四票数5
线程一票数3
线程二票数2
线程三票数1
线程一票数1
线程四票数1
线程二票数-2
```
### 2、线程同步机制
* 基本上所有解决多线程资源冲突问题的方法都是采用给定时间只允许一个线程访问共享资源，即给共享资源上一道锁。
* **锁的主要作用是为了防止不同线程在同一时间访问同一代码块，如果在同一时间访问同一代码块，有可能出现死“死锁”——两个线程运行时都在等待对方的锁，从而造成程序的停滞。**
#### 2.1、同步块
* 同步机制使用 synchronized 关键字，使用该关键字包含的代码块称为同步块，也称为临界区，语法如下：
```
synchronzied(Object){
}
// 例子：
public class SynchronizedTest implements Runnable {
private int num = 10;
public void run() {
while (true) {
synchronized (this) {
if (num > 0) {
try {
Thread.sleep( 100 );
} catch (Exception e) {
e.printStackTrace();
}
System.out.printf( "%s票数%d\n", Thread.currentThread().getName(), num );
num--;
}
else
break;
}
}
}
public static void main(String[] args) {
SynchronizedTest t = new SynchronizedTest();
Thread tA = new Thread( t,"线程一" );
Thread tB = new Thread( t,"线程二" );
Thread tC = new Thread( t,"线程三" );
Thread tD = new Thread( t,"线程四" );
// 启动线程
tA.start();
tB.start();
tC.start();
tD.start();
}
}
输出：
线程一票数10
线程一票数9
线程三票数8
线程四票数7
线程四票数6
线程二票数5
线程二票数4
线程四票数3
线程三票数2
线程一票数1
```
Markdown is supported
0% 或 .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑！
想要评论请 注册 或