16 位整型转 32 位浮点型

Int16sToFlt32sTest.java

package cn.kinco.test;

import org.junit.Test;

import java.nio.ByteBuffer;
import java.util.Arrays;

/**
 * @author neo.pan
 * @since 2019-07-16
 */
public class Int16sToFlt32sTest {

    public static float[] convertInt16sToFlt32s(short[] int16s) {
        final int flt32n = int16s.length / 2;
        float[] flt32s = new float[flt32n];

        ByteBuffer buffer = ByteBuffer.allocate(4);
        for (int i = 0; i < flt32n; i += 1) {
            buffer.putShort(int16s[i * 2]);
            buffer.putShort(int16s[i * 2 + 1]);
            flt32s[i] = buffer.getFloat(0);
            buffer.clear();
        }
        return flt32s;
    }

    @Test
    public void test1() {
        final short[] int16s = new short[]{16256, -32768, 16384, 0};
        final float[] flt32s = convertInt16sToFlt32s(int16s);
        System.out.println(Arrays.toString(flt32s));
    }

    @Test
    public void test2() {
        ByteBuffer buffer = ByteBuffer.allocate(4);
        buffer.putFloat(1F);
        System.out.println(buffer.getShort(0));
        System.out.println(buffer.getShort(1));
    }

}