bitmanipulation.java

java编程思想的部分实现

//:c03 :BitManipulation.java
//Using the bitwise operators.
import java.util.*;

public class BitManipulation
{
	public static void main(String[] args)
	{
		Random rand=new Random();
		int i=rand.nextInt();
		int j=rand.nextInt();
		PBinInt("-1",-1);
		PBinInt("+1",+1);
		int maxpos=2147483647;
		PBinInt("maxpos",maxpos);
		int maxneg=-2147483648;
		PBinInt("maxneg",maxneg);
		PBinInt("i",i);
		PBinInt("j",j);
		PBinInt("~i",~i);
		PBinInt("-i",-i);
		PBinInt("i&j",i&j);
		PBinInt("i|j",i|j);
		PBinInt("i^j",i^j);
		PBinInt("i<<5",i<<5);
		PBinInt("i>>5",i>>5);
		PBinInt("(~i)>>5",(~i)>>5);
		PBinInt("i>>>5",i>>>5);
		PBinInt("(~i)>>>5",(~i)>>>5);
		
		long l=rand.nextLong();
		long m=rand.nextLong();
		PBinLong("-1L",-1L);
		PBinLong("+1L",+1L);
		long ll=9223372036854775807L;
		PBinLong("maxpos",ll);
		long lln=-9223372036854775808L;
		PBinLong("maxneg",lln);
		PBinLong("l",l);
		PBinLong("~l",~l);
		PBinLong("-l",-l);
		PBinLong("m",m);
		PBinLong("l&m",l&m);
		PBinLong("l|m",l|m);
		PBinLong("l^m",l^m);
		PBinLong("l<<5",l<<5);
		PBinLong("l>>5",l>>5);
		PBinLong("(~l)>>5",(~l)>>5);
		PBinLong("l>>>5",l>>>5);
		PBinLong("(~l)>>>5",(~l)>>>5);
		PBinLong("(~l)>>>5",(~l)>>>5);
	
	}
	static void PBinInt(String s,int i)
	{
		System.out.println(s+",int:"+i+",binary:");
		System.out.print("  ");
		for(int j=31;j>=0;j--)
		{
			if(((1<<j)&i)!=0)
			System.out.print("1");
			else
			System.out.print("0");
		}
		System.out.println();
	}
		static void PBinLong(String s,long l)
		{
			System.out.println(s+",long;"+l+",binary:");
			System.out.print("  ");
			for(int i=63;i>=0;i--)
			{
				if(((1L<<i)&l)!=0)
				System.out.print("1");
				else
				System.out.print("0");
			}
			System.out.println();
		}
}