package com.yhh.chap2;
public class TraditionalThreadSynchronized {
/**
* @param args
*/
public static void main(String[] args) {
new TraditionalThreadSynchronized().init();
}
private void init(){
final Outputer outputer = new Outputer();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output("zhangxiaoxiang");
}
}
}).start();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output2("lihuoming");
}
}
}).start();
}
class Outputer{
public void output(String name){
int len = name.length();
synchronized(this) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
public void output2(String name){
int len = name.length();
synchronized(this) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
}
}
也可以寫(xiě)成以下：
package com.yhh.chap2;
public class TraditionalThreadSynchronized {
/**
* @param args
*/
public static void main(String[] args) {
new TraditionalThreadSynchronized().init();
}
private void init(){
final Outputer outputer = new Outputer();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output("zhangxiaoxiang");
}
}
}).start();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output2("lihuoming");
}
}
}).start();
}
class Outputer{
public void output(String name){
int len = name.length();
synchronized(this) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
//也是代表加的鎖是調(diào)用此方法的當(dāng)前對(duì)象outputer
public synchronized void output2(String name){
int len = name.length();
// synchronized(this) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
// }
}
}
}
此時(shí)上面synchronized（里面代表的是同一個(gè)outputer對(duì)象）結(jié)果正常：
lihuoming
zhangxiaoxiang
zhangxiaoxiang
lihuoming
lihuoming
zhangxiaoxiang
zhangxiaoxiang
lihuoming
package com.yhh.chap2;
public class TraditionalThreadSynchronized {
/**
* @param args
*/
public static void main(String[] args) {
new TraditionalThreadSynchronized().init();
}
private void init(){
final Outputer outputer = new Outputer();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new Outputer().output("zhangxiaoxiang");
}
}
}).start();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output2("lihuoming");
}
}
}).start();
}
class Outputer{
public void output(String name){
int len = name.length();
synchronized(this) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
public void output2(String name){
int len = name.length();
synchronized(this) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
}
}
此時(shí)上面synchronized(里面不是同一個(gè)對(duì)象，第一個(gè)是new了一個(gè)新對(duì)象,第二個(gè)是outputer)
所以結(jié)果：出現(xiàn)問(wèn)題
lihuoming
lihuoming
zhangxiaoxiang
zhangxiaoxlihuoming
iang
lihuoming
zhangxiaoxiang
lihuozhaminngxiaoxig
ang
package com.yhh.chap2;
public class TraditionalThreadSynchronized {
/**
* @param args
*/
public static void main(String[] args) {
new TraditionalThreadSynchronized().init();
}
private void init(){
final Outputer outputer = new Outputer();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output("zhangxiaoxiang");
}
}
}).start();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output2("lihuoming");
}
}
}).start();
}
class Outputer{
public void output(String name){
int len = name.length();
synchronized(Outputer.class) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
public void output2(String name){
int len = name.length();
synchronized(Outputer.class) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
}
}
此時(shí)上面調(diào)用方法的對(duì)象是同一個(gè)outputer,synchronized(里面加的是唯一的字節(jié)碼)
沒(méi)有問(wèn)題：
zhangxiaoxiang
lihuoming
lihuoming
zhangxiaoxiang
zhangxiaoxiang
lihuoming
zhangxiaoxiang
lihuoming
zhangxiaoxiang
package com.yhh.chap2;
public class TraditionalThreadSynchronized {
/**
* @param args
*/
public static void main(String[] args) {
new TraditionalThreadSynchronized().init();
}
private void init(){
final Outputer outputer = new Outputer();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new Outputer().output("zhangxiaoxiang");
}
}
}).start();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output2("lihuoming");
}
}
}).start();
}
class Outputer{
public void output(String name){
int len = name.length();
synchronized(Outputer.class) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
public void output2(String name){
int len = name.length();
synchronized(Outputer.class) {
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
}
}
此時(shí)上面調(diào)用方法的對(duì)象不是同一個(gè)，但synchronized(Outputer.class)是一樣的所以沒(méi)得問(wèn)題：
zhangxiaoxiang
lihuoming
lihuoming
zhangxiaoxiang
zhangxiaoxiang
lihuoming
zhangxiaoxiang
lihuoming
zhangxiaoxiang
