CSC231 Bitwise Logical Operators in Java

--D. Thiebaut 23:38, 9 October 2012 (EDT)

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Source

public class Demo1 {
    final static byte START  = 0x01;
    final static byte PHASE1 = 0x02;
    final static byte PHASE2 = 0x04;
    final static byte PHASE3 = 0x08;
    final static byte DONE   = 0x10;
    
    /**
     * @param args
     */
    public static void main(String[] args) {
	byte status = START;
	System.out.println( "Status = " + toBinary8( status ) );
	
	for ( int i = 0; i< 100; i++ ) {
	    if ( Math.random() < 0.1 ) status = (byte) (status | PHASE1);
	    else if ( Math.random() < 0.1 ) status = (byte) (status ^ PHASE1);
	    else if ( Math.random() < 0.1 ) status = (byte) (status ^ PHASE2);
	    else if ( Math.random() < 0.1 ) status = (byte) (status ^ PHASE3);
	    else if ( Math.random() < 0.1 ) status = (byte) (status ^ DONE);
	    System.out.println( "Status = " + toBinary8( status ) );
	    if ( (status & DONE) != 0) 
		break;
	}	
    }
 
    private static String toBinary8( byte x ) {
	return  String.format( "%8s", Integer.toBinaryString(x) ).replace(' ', '0');
    }
}

Example of Output

javac Demo1.java
java Demo1

Status = 00000001
Status = 00000001
Status = 00000001
Status = 00000001
Status = 00000001
Status = 00000001
Status = 00000011 
Status = 00001011
Status = 00001011
Status = 00001011
Status = 00011011