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一道面试题，循环按顺序打印ABCD，每个线程只打印一个字母
import java.util.concurrent.atomic.AtomicInteger;
/**
* 一道面试题，循环按顺序打印ABCD，每个线程只打印一个字母 当时未做出来，回来经研究以一下代码实现
*
* @author Loong
*
*/
public class Print {
public static void main(String[] args) {
String[] contents = { "A", "B", "C", "D" };
AtomicInteger index = new AtomicInteger(0);
for (String content : contents) {
new Thread(new Printer(index, contents, content)).start();
}
}
}class Printer implements Runnable {
private String[] content = null;
private AtomicInteger index;
private String printText;
public Printer(AtomicInteger index, String[] content, String printText) {
this.content = content;
this.index = index;
this.printText = printText;
}@Override
public void run() {
while (true) {
synchronized (content) {
while (!printText.equals(content[index.intValue()])) {
try {
content.wait();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
System.out.println(printText);
index.set(index.intValue() + 1);
if (index.intValue() >= content.length) {
index.set(0);
}
content.notifyAll();
}
}
}}
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