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Lesson1_1.java
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42 lines (32 loc) · 1.28 KB
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import java.math.BigInteger;
public class Lesson1_1 {
/**
* @Description: 十进制转换成二进制
* @param decimalSource
* @return String
*/
public static String decimalToBinary(int decimalSource) {
BigInteger bi = new BigInteger(String.valueOf(decimalSource)); //转换成BigInteger类型，默认是十进制
return bi.toString(2); //参数2指定的是转化成二进制
}
/**
* @Description: 二进制转换成十进制
* @param binarySource
* @return int
*/
public static int binaryToDecimal(String binarySource) {
BigInteger bi = new BigInteger(binarySource, 2); //转换为BigInteger类型，参数2指定的是二进制
return Integer.parseInt(bi.toString()); //默认转换成十进制
}
public static void main(String[] args) {
System.out.println(String.format("%d", -121));
System.exit(0);
int a = -10;
String b = "10100010";
System.out.println(String.format("数字%d的二进制是%s", a, Lesson1_1.decimalToBinary(a))); //获取十进制数53的二进制数
System.out.println(String.format("数字%s的十进制是%d", b, Lesson1_1.binaryToDecimal(b))); //获取二进制数110101的十进制数
int max = 2147483647;
System.out.println(max);
System.out.println(max + 2);
}
}