Pro Java 8 Programming, 3rd Edition

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关键词：Programming Edition Program editio dition Java

1. Listing 3-1. A Skeleton Runnable Implementation
   
2. class MyRunnable implements Runnable {
   
3. public void run() {
   
4. performLongRunningTask();
   
5. }
   
6. private void performLongRunningTask() {
   
7. // Do some work here
   
8. }
   
9. }

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1. Listing 3-2. Supplying a Runnable Reference to ThreadPoolExecutor
   
2. public void startExecution()
   
3. {
   
4. ThreadPoolExecutor executor = getExecutor();
   
5. Runnable newInstance = new MyRunnable();
   
6. executor.execute(newInstance);
   
7. }

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1. Listing 3-3. It’s Common for a run() Method to Delegate Processing to Some Other Method
   
2. public void startExecution() {
   
3. ThreadPoolExecutor executor = getExecutor();
   
4. Runnable newInstance = new Runnable() {
   
5. public void run() {
   
6. performLongRunningTask();
   
7. }
   
8. };
   
9. executor.execute(newInstance);
   
10. }
    
11. void performLongRunningTask() {
    
12. // Do some work here
    
13. }

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1. Listing 3-4. Using the execute() Method in ThreadPoolExecutor with a Lambda Expression
   
2. ThreadPoolExecutor executor = getExecutor();
   
3. executor.execute(() -> performLongRunningTask());

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1. Listing 3-5. Sorting Strings Using Arrays.sort()
   
2. String[] stringsToSort;
   
3. .
   
4. .
   
5. .
   
6. Arrays.sort(stringsToSort);

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1. Listing 3-6. A Comparator Implementation for Sorting Strings Containing Numeric Values
   
2. Comparator<String> numericStringSorter = new Comparator<String>() {
   
3. public int compare(String s1, String s2) {
   
4. int i1 = Integer.valueOf(s1);
   
5. int i2 = Integer.valueOf(s2);
   
6. int relativeValue = Integer.compare(i1, i2);
   
7. return relativeValue;
   
8. }
   
9. };
   
10. Arrays.sort(stringsToSort, numericStringSorter);

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