自己实现AtomicFloat的示例代码

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import java.util.concurrent.atomic.AtomicInteger;import static java.lang.Float.*;class AtomicFloat extends Number {    private AtomicInteger bits;    public AtomicFloat() {        this(0f);    }    public AtomicFloat(float initialValue) {        bits = new AtomicInteger(floatToIntBits(initialValue));    }    public final boolean compareAndSet(float expect, float update) {        return bits.compareAndSet(floatToIntBits(expect),                                  floatToIntBits(update));    }    public final void set(float newValue) {        bits.set(floatToIntBits(newValue));    }    public final float get() {        return intBitsToFloat(bits.get());    }    public float floatValue() {        return get();    }    public final float getAndSet(float newValue) {        return intBitsToFloat(bits.getAndSet(floatToIntBits(newValue)));    }    public final boolean weakCompareAndSet(float expect, float update) {        return bits.weakCompareAndSet(floatToIntBits(expect),                                      floatToIntBits(update));    }    public double doubleValue() { return (double) floatValue(); }    public int intValue()       { return (int) get();           }    public long longValue()     { return (long) get();          }}

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