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BigInteger big=new BigInteger(string a);
´ÓBigIntegerµ½int
int b=big.intValue()
´Óintµ½BigInteger:
big=BigInteger.valeOf(int b);
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Iterator iter = map.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry entry = (Map.Entry) iter.next();
Object key = entry.getKey();
Object val = entry.getValue();
}
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