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java线程中的join方法、yield方法和priority线程优先级

    博客分类：
  • java
java 
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java线程中的join方法、yield方法和priority线程优先级

测试join方法，合并线程

TestJoin.java

public class TestJoin {
  public static void main(String[] args) {
    MyThread2 t1 = new MyThread2("abcde");
    t1.start();
    try {
		//join合并线程，将t1，main两个线程，合并到一个线程
    	t1.join();
    } catch (InterruptedException e) {}
    	
    for(int i=1;i<=10;i++){
      System.out.println("i am main thread");
    }
  }
}
class MyThread2 extends Thread {
  //给线程命名
  MyThread2(String s){
  	super(s);
  }
  
  public void run(){
    for(int i =1;i<=10;i++){
	  //打印
      System.out.println("i am "+getName());
      try {
      	sleep(1000);
      } catch (InterruptedException e) {
      	return;
      }
    }
  }
}

 

F:\java\Thread>javac TestJoin.java

F:\java\Thread>java TestJoin
i am abcde
i am abcde
i am abcde
i am abcde
i am abcde
i am abcde
i am abcde
i am abcde
i am abcde
i am abcde
i am main thread
i am main thread
i am main thread
i am main thread
i am main thread
i am main thread
i am main thread
i am main thread
i am main thread
i am main thread

F:\java\Thread>

 

测试yield，让出线程

TestYield.java

public class TestYield {
  public static void main(String[] args) {
    MyThread3 t1 = new MyThread3("t1");
    MyThread3 t2 = new MyThread3("t2");
    t1.start(); 
	t2.start();
  }
}
class MyThread3 extends Thread {
  MyThread3(String s){super(s);}
  public void run(){
    for(int i =1;i<=100;i++){
      System.out.println(getName()+": "+i);
      if(i%10==0){
		//当i整除10时，让出线程
        yield();
      }
    }
  }
}

 

F:\java\Thread>javac TestYield.java

F:\java\Thread>java TestYield
t1: 1
t2: 1
t1: 2
t2: 2
t1: 3
t2: 3
t1: 4
t2: 4
t1: 5
t2: 5
t1: 6
t2: 6
t1: 7
t2: 7
t1: 8
t2: 8
t1: 9
t2: 9
t1: 10
t2: 10
t1: 11
t2: 11
t1: 12
t2: 12
t1: 13
t2: 13
t1: 14
t2: 14
t1: 15
t2: 15
t1: 16
t2: 16
t1: 17
t2: 17
t1: 18
t2: 18
t1: 19
t2: 19
t1: 20
t2: 20
t1: 21
t2: 21
t1: 22
t2: 22
t1: 23
t2: 23
t1: 24
t2: 24
t1: 25
t2: 25
t1: 26
t2: 26
t1: 27
t2: 27
t1: 28
t2: 28
t1: 29
t2: 29
t1: 30
t2: 30
t1: 31
t2: 31
t1: 32
t2: 32
t1: 33
t2: 33
t1: 34
t2: 34
t1: 35
t2: 35
t1: 36
t2: 36
t1: 37
t2: 37
t1: 38
t2: 38
t1: 39
t2: 39
t1: 40
t2: 40
t1: 41
t2: 41
t1: 42
t2: 42
t1: 43
t2: 43
t1: 44
t2: 44
t1: 45
t2: 45
t1: 46
t2: 46
t1: 47
t2: 47
t1: 48
t2: 48
t1: 49
t2: 49
t1: 50
t2: 50
t1: 51
t2: 51
t1: 52
t2: 52
t1: 53
t2: 53
t1: 54
t2: 54
t1: 55
t2: 55
t1: 56
t2: 56
t1: 57
t2: 57
t1: 58
t2: 58
t1: 59
t2: 59
t1: 60
t2: 60
t1: 61
t2: 61
t1: 62
t2: 62
t1: 63
t2: 63
t1: 64
t2: 64
t1: 65
t2: 65
t1: 66
t2: 66
t1: 67
t2: 67
t1: 68
t2: 68
t1: 69
t2: 69
t1: 70
t2: 70
t1: 71
t2: 71
t1: 72
t2: 72
t1: 73
t2: 73
t1: 74
t2: 74
t1: 75
t2: 75
t1: 76
t2: 76
t1: 77
t2: 77
t1: 78
t2: 78
t2: 79
t1: 79
t2: 80
t1: 80
t2: 81
t1: 81
t2: 82
t1: 82
t2: 83
t1: 83
t2: 84
t1: 84
t2: 85
t1: 85
t2: 86
t1: 86
t2: 87
t1: 87
t2: 88
t1: 88
t2: 89
t1: 89
t2: 90
t1: 90
t2: 91
t1: 91
t2: 92
t1: 92
t2: 93
t1: 93
t2: 94
t1: 94
t2: 95
t1: 95
t2: 96
t1: 96
t2: 97
t1: 97
t2: 98
t1: 98
t2: 99
t1: 99
t2: 100
t1: 100

F:\java\Thread>

 

测试线程优先级，

TestPriority.java

/*
	测试线程优先级
*/
public class TestPriority {
	public static void main(String[] args) {
		Thread t1 = new Thread(new T1());
		Thread t2 = new Thread(new T2());
		//设置线程优先级，Thread.NORM_PRIORITY一般优先级，加3
		t1.setPriority(Thread.NORM_PRIORITY + 3);
		t1.start();
		t2.start();
	}
}

class T1 implements Runnable {
	public void run() {
		for(int i=0; i<1000; i++) {
			System.out.println("T1: " + i);
		}
	}
}

class T2 implements Runnable {
	public void run() {
		for(int i=0; i<1000; i++) {
			System.out.println("------T2: " + i);
		}
	}
}

 

F:\java\Thread>javac TestPriority.java

F:\java\Thread>java TestPriority
T1: 0
------T2: 0
T1: 1
------T2: 1
T1: 2
------T2: 2
T1: 3
------T2: 3
T1: 4
T1: 5
------T2: 4
T1: 6
------T2: 5
T1: 7
------T2: 6
T1: 8
------T2: 7
T1: 9
------T2: 8
T1: 10
------T2: 9
T1: 11
------T2: 10
T1: 12
------T2: 11
T1: 13
------T2: 12
T1: 14
------T2: 13
T1: 15
------T2: 14
T1: 16
------T2: 15
T1: 17
------T2: 16
T1: 18
------T2: 17
T1: 19
------T2: 18
T1: 20
------T2: 19
T1: 21
------T2: 20
T1: 22
------T2: 21
T1: 23
------T2: 22
T1: 24
------T2: 23
T1: 25
------T2: 24
T1: 26
------T2: 25
T1: 27
------T2: 26
T1: 28
------T2: 27
T1: 29
T1: 30
------T2: 28
T1: 31
------T2: 29
T1: 32
------T2: 30
T1: 33
------T2: 31
T1: 34
------T2: 32
T1: 35
------T2: 33
T1: 36
------T2: 34
T1: 37
------T2: 35
T1: 38
------T2: 36
T1: 39
------T2: 37
T1: 40
------T2: 38
T1: 41
------T2: 39
T1: 42
------T2: 40
T1: 43
------T2: 41
T1: 44
------T2: 42
T1: 45
------T2: 43
T1: 46
------T2: 44
T1: 47
------T2: 45
T1: 48
------T2: 46
T1: 49
------T2: 47
T1: 50
------T2: 48
T1: 51
------T2: 49
T1: 52
------T2: 50
T1: 53
------T2: 51
T1: 54
------T2: 52
T1: 55
------T2: 53
T1: 56
------T2: 54
T1: 57
------T2: 55
T1: 58
------T2: 56
T1: 59
------T2: 57
T1: 60
------T2: 58
T1: 61
------T2: 59
T1: 62
------T2: 60
T1: 63
------T2: 61
T1: 64
T1: 65
------T2: 62
T1: 66
------T2: 63
T1: 67
T1: 68
------T2: 64
T1: 69
------T2: 65
T1: 70
------T2: 66
T1: 71
------T2: 67
T1: 72
------T2: 68
T1: 73
------T2: 69
T1: 74
------T2: 70
T1: 75
------T2: 71
T1: 76
------T2: 72
T1: 77
------T2: 73
T1: 78
------T2: 74
T1: 79
------T2: 75
T1: 80
------T2: 76
T1: 81
------T2: 77
T1: 82
------T2: 78
T1: 83
------T2: 79
T1: 84
------T2: 80
T1: 85
------T2: 81
T1: 86
------T2: 82
T1: 87
------T2: 83
T1: 88
------T2: 84
T1: 89
T1: 90
------T2: 85
T1: 91
------T2: 86
T1: 92
------T2: 87
T1: 93
------T2: 88
T1: 94
------T2: 89
T1: 95
------T2: 90
T1: 96
------T2: 91
T1: 97
------T2: 92
T1: 98
------T2: 93
T1: 99
------T2: 94
T1: 100
------T2: 95
T1: 101
------T2: 96
T1: 102
------T2: 97
T1: 103
T1: 104
------T2: 98
T1: 105
------T2: 99
T1: 106
------T2: 100
T1: 107
------T2: 101
T1: 108
------T2: 102
T1: 109
------T2: 103
T1: 110
------T2: 104
T1: 111
------T2: 105
T1: 112
------T2: 106
T1: 113
------T2: 107
T1: 114
------T2: 108
T1: 115
------T2: 109
T1: 116
------T2: 110
T1: 117
------T2: 111
T1: 118
------T2: 112
T1: 119
------T2: 113
T1: 120
------T2: 114
T1: 121
------T2: 115
T1: 122
------T2: 116
T1: 123
------T2: 117
T1: 124
------T2: 118
T1: 125
------T2: 119
T1: 126
------T2: 120
T1: 127
------T2: 121
T1: 128
------T2: 122
T1: 129
------T2: 123
T1: 130
------T2: 124
T1: 131
------T2: 125
T1: 132
------T2: 126
T1: 133
------T2: 127
T1: 134
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T1: 135
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T1: 136
------T2: 130
T1: 137
------T2: 131
T1: 138
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T1: 139
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T1: 140
------T2: 134
T1: 141
------T2: 135
T1: 142
------T2: 136
T1: 143
------T2: 137
T1: 144
------T2: 138
T1: 145
------T2: 139
T1: 146
------T2: 140
T1: 147
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T1: 148
------T2: 142
T1: 149
------T2: 143
T1: 150
------T2: 144
T1: 151
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T1: 152
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T1: 153
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T1: 154
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T1: 155
------T2: 149
T1: 156
------T2: 150
T1: 157
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T1: 158
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T1: 159
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T1: 160
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T1: 161
------T2: 155
T1: 162
------T2: 156
T1: 163
------T2: 157
T1: 164
------T2: 158
T1: 165
------T2: 159
T1: 166
------T2: 160
T1: 167
------T2: 161
T1: 168
------T2: 162
T1: 169
------T2: 163
T1: 170
------T2: 164
T1: 171
------T2: 165
T1: 172
------T2: 166
T1: 173
------T2: 167
T1: 174
------T2: 168
T1: 175
------T2: 169
T1: 176
------T2: 170
T1: 177
------T2: 171
T1: 178
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T1: 179
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T1: 180
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T1: 181
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T1: 182
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T1: 183
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T1: 184
------T2: 178
T1: 185
------T2: 179
T1: 186
------T2: 180
T1: 187
------T2: 181
T1: 188
------T2: 182
T1: 189
------T2: 183
T1: 190
------T2: 184
T1: 191
------T2: 185
T1: 192
------T2: 186
T1: 193
------T2: 187
T1: 194
------T2: 188
T1: 195
------T2: 189
T1: 196
------T2: 190
T1: 197
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T1: 198
------T2: 192
T1: 199
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T1: 200
------T2: 194
T1: 201
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T1: 202
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T1: 203
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T1: 204
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T1: 205
------T2: 199
T1: 206
------T2: 200
T1: 207
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T1: 208
------T2: 202
T1: 209
------T2: 203
T1: 210
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T1: 211
------T2: 205
T1: 212
------T2: 206
T1: 213
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T1: 214
------T2: 208
T1: 215
------T2: 209
T1: 216
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T1: 217
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T1: 218
------T2: 212
T1: 219
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T1: 220
------T2: 214
T1: 221
------T2: 215
T1: 222
T1: 223
T1: 224
T1: 225
T1: 226
T1: 227
------T2: 216
T1: 228
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T1: 229
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T1: 230
------T2: 219
T1: 231
------T2: 220
T1: 232
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T1: 233
------T2: 222
T1: 234
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T1: 235
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T1: 237
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T1: 240
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T1: 241
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------T2: 235
T1: 242
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T1: 250
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T1: 280
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T1: 282
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T1: 292
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T1: 312
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T1: 313
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T1: 320
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T1: 327
------T2: 319
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T1: 328
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T1: 339
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T1: 345
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T1: 365
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T1: 367
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T1: 369
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T1: 373
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T1: 380
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T1: 386
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T1: 387
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------T2: 381
T1: 395
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T1: 396
------T2: 383
T1: 397
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T1: 398
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T1: 399
------T2: 386
T1: 400
------T2: 387
T1: 401
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------T2: 389
T1: 402
------T2: 390
T1: 403
------T2: 391
T1: 404
T1: 405
------T2: 392
T1: 406
------T2: 393
T1: 407
T1: 408
------T2: 394
T1: 409
------T2: 395
T1: 410
------T2: 396
T1: 411
------T2: 397
T1: 412
T1: 413
------T2: 398
T1: 414
------T2: 399
T1: 415
------T2: 400
T1: 416
------T2: 401
T1: 417
------T2: 402
T1: 418
------T2: 403
------T2: 404
T1: 419
------T2: 405
T1: 420
------T2: 406
T1: 421
------T2: 407
T1: 422
------T2: 408
T1: 423
------T2: 409
T1: 424
------T2: 410
T1: 425
------T2: 411
T1: 426
------T2: 412
T1: 427
------T2: 413
T1: 428
------T2: 414
T1: 429
------T2: 415
T1: 430
T1: 431
------T2: 416
T1: 432
------T2: 417
T1: 433
------T2: 418
T1: 434
------T2: 419
T1: 435
------T2: 420
T1: 436
------T2: 421
T1: 437
------T2: 422
T1: 438
------T2: 423
T1: 439
------T2: 424
T1: 440
------T2: 425
T1: 441
------T2: 426
T1: 442
------T2: 427
T1: 443
------T2: 428
T1: 444
T1: 445
------T2: 429
T1: 446
T1: 447
------T2: 430
T1: 448
------T2: 431
T1: 449
------T2: 432
T1: 450
------T2: 433
------T2: 434
T1: 451
------T2: 435
T1: 452
------T2: 436
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F:\java\Thread>

 

 

 

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