标签:runnable ber 静态 err 结果 tor override pack ring
题目:打印是one还是two
第一张情况:两个普通同步方法,打印结果是
One
Two
1 package day1; 2 3 public class TestThread8Monitor { 4 5 public static void main(String[] args) { 6 Number number = new Number(); 7 8 new Thread(new Runnable() { 9 10 @Override 11 public void run() { 12 number.getOne(); 13 14 } 15 }).start(); 16 17 new Thread(new Runnable() { 18 19 @Override 20 public void run() { 21 number.getTwo(); 22 } 23 }).start(); 24 } 25 26 } 27 28 class Number { 29 30 public synchronized void getOne() { 31 System.out.println("One"); 32 } 33 34 public synchronized void getTwo() { 35 System.out.println("Two"); 36 } 37 }
第二种情况:在getOne方法中新增一个Thread.sleep()调用,打印结果
One
Two
1 package day1; 2 3 public class TestThread8Monitor { 4 5 public static void main(String[] args) { 6 Number number = new Number(); 7 8 new Thread(new Runnable() { 9 10 @Override 11 public void run() { 12 number.getOne(); 13 14 } 15 }).start(); 16 17 new Thread(new Runnable() { 18 19 @Override 20 public void run() { 21 number.getTwo(); 22 } 23 }).start(); 24 } 25 26 } 27 28 class Number { 29 30 public synchronized void getOne() { 31 32 try { 33 Thread.sleep(3000); 34 } catch (Exception e) { 35 // TODO: handle exception 36 } 37 38 System.out.println("One"); 39 } 40 41 public synchronized void getTwo() { 42 System.out.println("Two"); 43 } 44 }
第三种情况:在Number类中新增一个普通方法,打印结果
Three
One
Two
/** * */ package day1; public class TestThread8Monitor { public static void main(String[] args) { Number number = new Number(); new Thread(new Runnable() { @Override public void run() { number.getOne(); } }).start(); new Thread(new Runnable() { @Override public void run() { number.getTwo(); } }).start(); new Thread(new Runnable() { @Override public void run() { number.getThree(); } }).start(); } } class Number { public synchronized void getOne() { try { Thread.sleep(3000); } catch (Exception e) { // TODO: handle exception } System.out.println("One"); } public synchronized void getTwo() { System.out.println("Two"); } public void getThree() { System.out.println("Three"); } }
第四种情况:两个普通同步方法,两个Number对象,打印结果
Two
One
1 /** 2 * 3 */ 4 package day1; 5 6 public class TestThread8Monitor { 7 8 public static void main(String[] args) { 9 Number number = new Number(); 10 Number number2 = new Number(); 11 12 new Thread(new Runnable() { 13 14 @Override 15 public void run() { 16 number.getOne(); 17 18 } 19 }).start(); 20 21 new Thread(new Runnable() { 22 23 @Override 24 public void run() { 25 number2.getTwo(); 26 } 27 }).start(); 28 29 30 } 31 32 } 33 34 class Number { 35 36 public synchronized void getOne() { 37 38 try { 39 Thread.sleep(3000); 40 } catch (Exception e) { 41 // TODO: handle exception 42 } 43 44 System.out.println("One"); 45 } 46 47 public synchronized void getTwo() { 48 System.out.println("Two"); 49 } 50 51 public void getThree() { 52 System.out.println("Three"); 53 } 54 }
第五种情况:修改getOne()为静态同步方法,打印结果
Two
One
1 /** 2 * 3 */ 4 package day1; 5 6 public class TestThread8Monitor { 7 8 public static void main(String[] args) { 9 Number number = new Number(); 10 11 new Thread(new Runnable() { 12 13 @Override 14 public void run() { 15 number.getOne(); 16 17 } 18 }).start(); 19 20 new Thread(new Runnable() { 21 22 @Override 23 public void run() { 24 number.getTwo(); 25 } 26 }).start(); 27 28 29 } 30 31 } 32 33 class Number { 34 35 public static synchronized void getOne() { 36 37 try { 38 Thread.sleep(3000); 39 } catch (Exception e) { 40 // TODO: handle exception 41 } 42 43 System.out.println("One"); 44 } 45 46 public synchronized void getTwo() { 47 System.out.println("Two"); 48 } 49 50 public void getThree() { 51 System.out.println("Three"); 52 } 53 }
第六种情况:修改两个方法均为静态同步方法,一个Number对象,打印结果
One
Two
1 /** 2 * 3 */ 4 package day1; 5 6 public class TestThread8Monitor { 7 8 public static void main(String[] args) { 9 Number number = new Number(); 10 11 new Thread(new Runnable() { 12 13 @Override 14 public void run() { 15 number.getOne(); 16 17 } 18 }).start(); 19 20 new Thread(new Runnable() { 21 22 @Override 23 public void run() { 24 number.getTwo(); 25 } 26 }).start(); 27 28 29 } 30 31 } 32 33 class Number { 34 35 public static synchronized void getOne() { 36 37 try { 38 Thread.sleep(3000); 39 } catch (Exception e) { 40 // TODO: handle exception 41 } 42 43 System.out.println("One"); 44 } 45 46 public static synchronized void getTwo() { 47 System.out.println("Two"); 48 } 49 50 public void getThree() { 51 System.out.println("Three"); 52 } 53 }
第七章情况:一种是静态同步方法,一个非静态同步方法,两个Number对象,打印结果
Two
One
1 /** 2 * 3 */ 4 package day1; 5 6 public class TestThread8Monitor { 7 8 public static void main(String[] args) { 9 Number number = new Number(); 10 Number number2 = new Number(); 11 12 new Thread(new Runnable() { 13 14 @Override 15 public void run() { 16 number.getOne(); 17 18 } 19 }).start(); 20 21 new Thread(new Runnable() { 22 23 @Override 24 public void run() { 25 number2.getTwo(); 26 } 27 }).start(); 28 29 30 } 31 32 } 33 34 class Number { 35 36 public static synchronized void getOne() { 37 38 try { 39 Thread.sleep(3000); 40 } catch (Exception e) { 41 // TODO: handle exception 42 } 43 44 System.out.println("One"); 45 } 46 47 public synchronized void getTwo() { 48 System.out.println("Two"); 49 } 50 51 public void getThree() { 52 System.out.println("Three"); 53 } 54 }
第第八种情况:两个静态同步方法,两个Number对象,打印
One
Two
1 /** 2 * 3 */ 4 package day1; 5 6 public class TestThread8Monitor { 7 8 public static void main(String[] args) { 9 Number number = new Number(); 10 Number number2 = new Number(); 11 12 new Thread(new Runnable() { 13 14 @Override 15 public void run() { 16 number.getOne(); 17 18 } 19 }).start(); 20 21 new Thread(new Runnable() { 22 23 @Override 24 public void run() { 25 number2.getTwo(); 26 } 27 }).start(); 28 29 30 } 31 32 } 33 34 class Number { 35 36 public static synchronized void getOne() { 37 38 try { 39 Thread.sleep(3000); 40 } catch (Exception e) { 41 // TODO: handle exception 42 } 43 44 System.out.println("One"); 45 } 46 47 public static synchronized void getTwo() { 48 System.out.println("Two"); 49 } 50 51 public void getThree() { 52 System.out.println("Three"); 53 } 54 }
标签:runnable ber 静态 err 结果 tor override pack ring
原文地址:https://www.cnblogs.com/wylwyl/p/10522114.html