simple Java program

/* The Computer Language Benchmarks Game
   https://salsa.debian.org/benchmarksgame-team/benchmarksgame/

   line-by-line from Greg Buchholz's C program
*/


class simple {

public static void main(String[] args) {   
 
    int w, h, x, y, bit_num = 0;
    int byte_acc = 0;
    int i, iter = 50;
    double limit = 2.0;
    double Zr, Zi, Cr, Ci, Tr, Ti; 

    w = Integer.parseInt(args[0]);
    h = w;    

    System.out.println("P4\n"+ w + " " + h);    
    
    for(y=0;y<h;y++) 
    {
        for(x=0;x<w;x++)
        {
            Zr = 0.0; Zi = 0.0;
            Cr = (2*(double)x/w - 1.5); Ci=(2*(double)y/h - 1);
        
            for (i=0;i<iter;i++)
            {
                Tr = Zr*Zr - Zi*Zi + Cr;
                Ti = 2*Zr*Zi + Ci;
                Zr = Tr; Zi = Ti;
                if (Zr*Zr+Zi*Zi > limit*limit)
                    break;
            }
        
            if(Zr*Zr+Zi*Zi > limit*limit) 
                byte_acc = (byte_acc << 1) | 0x00;
            else
                byte_acc = (byte_acc << 1) | 0x01;
                
            bit_num++; 

            if(bit_num == 8)
            {
                System.out.write(byte_acc);
                byte_acc = 0;
                bit_num = 0;
            }
            else if(x == w-1)
            {
                byte_acc = byte_acc << (8-w%8);
                System.out.write(byte_acc);
                byte_acc = 0;
                bit_num = 0;
            }
        }
    }	
    System.out.flush();
}
}
    

NOTES:
64-bit Ubuntu quad core
java 22 2024-03-19
Java HotSpot(TM) 64-Bit Server VM
(build 22+36-2370, 
mixed mode, sharing)


 Wed, 20 Mar 2024 06:31:46 GMT

MAKE:
mv simple.java simple.java
mv: 'simple.java' and 'simple.java' are the same file
make: [/home/dunham/all-benchmarksgame/2000-benchmarksgame/nanobench/makefiles/u64q.programs.Makefile:266: simple.java_run] Error 1 (ignored)
/opt/src/jdk-22/bin/javac -d .  simple.java

1.67s to complete and log all make actions

COMMAND LINE:
 /opt/src/jdk-22/bin/java   simple 16000

(BINARY) PROGRAM OUTPUT NOT SHOWN