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Every method of java will have a stack, and every invokation on that
method will have it's own 'stack frame'. So the locale data of one
method invokation will not affect others.
Please do not confuse 'synchronization' with 'atomic'.
If one static method is synchronized, JVM will use the Class as the lock. If not, it acts as an instance method.
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import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import net.sourceforge.pinyin4j.PinyinHelper;
public class PinyinComparator implements Comparator<Object> {
private String concatPinyinStringArray(String[] pinyinArray) {
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