FileDocCategorySizeDatePackage
Basic.javaAPI DocExample1439Wed Jul 07 11:55:54 BST 2004javathreads.examples.ch15.example13

Basic

public class Basic extends Object implements ScaleTester

Fields Summary
private float[]
lookupValues
int
nCols
int
nRows
PrintStream
devnull
Constructors Summary
Methods Summary
public float[][]doCalc()

	NumberFormat nf = NumberFormat.getInstance();
	nf.setMaximumFractionDigits(4);
        for (int i = 0; i < nCols; i++) {
            lookupValues[0][i] = 0;
        }
        for (int j = 1; j < nRows; j++) {
            for (int i = 0; i < nCols; i++) {
                float sinValue =
                                (float)Math.sin((i % 360)*Math.PI/180.0);
                lookupValues[j][i] = sinValue * (float)i / 180.0f;
                lookupValues[j][i] +=
                                lookupValues[j-1][i]*(float)j/180.0f;
		if ((j % 20) == 0)
		    devnull.println(nf.format(lookupValues[j][i]));
            }
        }
        return lookupValues;
public voidinit(int nRows, int nCols, int nThreads)

        this.nCols = nCols;
        this.nRows = nRows;
        lookupValues = new float[nRows][];
        for (int j = 0; j < nRows; j++) {
            lookupValues[j] = new float[nCols];
        }
	try {
	    devnull = new PrintStream(new FileOutputStream("/dev/null"));
	} catch (IOException e) {
	    throw new IllegalArgumentException("Can't open /dev/null " + e);
	}