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byte b1 = 10;
byte b2 = 20;
byte b3 = b1 + b2; //Óï·¨´íÎó£¬ÀàÐͲ»Æ¥Åä
int n = b1 + b2; //»òÕß byte b3 = (byte)(b1 + b2);
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int n = -1;
boolean b1 = (n >= 0) && (n < 10);
boolean b2 = (n >= 0) & (n < 10);
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package com.allywll.core.exec.base;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.LinkedList;
import java.util.List;
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