ACM 1000题 A + B Problem（为什么你本地测试正确，提交代码却错误）

A + B Problem

[align=center]Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 747156    Accepted Submission(s): 229672
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[align=left]Problem Description[/align] Calculate A + B.
 [align=left]Input[/align] Each line will contain two integers A and B. Process to end of file.
 [align=left]Output[/align] For each case, output A + B in one line.
 
[align=left]Sample Input[/align]

1 1

[align=left]Sample Output[/align]

2 
[align=left]Author[/align] HDOJ

 为什么你本地测试正确，提交代码却错误？
此题需要一次测试多次数据，而不是只测试一个

import java.math.*;
import java.util.*;

public class Main extends Object {

private static final Scanner cache = new Scanner(System.in);

public static void main(String[] args) {
while (cache.hasNext()) {
String a = cache.next();
String b = cache.next();

BigDecimal A = new BigDecimal(a);
BigDecimal B = new BigDecimal(b);

BigDecimal SUM = A.add(B);

System.out.println(SUM.toPlainString());
}
cache.close();
}

}