本文整理了Java中sun.misc.Unsafe类的一些代码示例，展示了Unsafe类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Unsafe类的具体详情如下：
包路径：sun.misc.Unsafe
类名称：Unsafe

Unsafe介绍

[英]The package name notwithstanding, this class is the quasi-standard way for Java code to gain access to and use functionality which, when unsupervised, would allow one to break the pointer/type safety of Java.
[中]尽管有包名，但这个类是Java代码访问和使用功能的准标准方式，在无监督的情况下，它将允许人们破坏Java的指针/类型安全性。

代码示例

代码示例来源：origin: google/guava

@Override
public long getLongLittleEndian(byte[] array, int offset) {
 return theUnsafe.getLong(array, (long) offset + BYTE_ARRAY_BASE_OFFSET);
}

代码示例来源：origin: netty/netty

static int getInt(Object object, long fieldOffset) {
  return UNSAFE.getInt(object, fieldOffset);
}

代码示例来源：origin: netty/netty

static void putInt(byte[] data, int index, int value) {
  UNSAFE.putInt(data, BYTE_ARRAY_BASE_OFFSET + index, value);
}

代码示例来源：origin: prestodb/presto

public void clear(int offset, int length)
{
  while (length >= SIZE_OF_LONG) {
    unsafe.putLong(base, address + offset, 0);
    offset += SIZE_OF_LONG;
    length -= SIZE_OF_LONG;
  }
  while (length > 0) {
    unsafe.putByte(base, address + offset, (byte) 0);
    offset++;
    length--;
  }
}

代码示例来源：origin: redisson/redisson

static String unsafeCreateString(char[] chars) {
  String mutable = new String();
  UNSAFE.putObject(mutable, STRING_VALUE_FIELD_OFFSET, chars);
  if (STRING_COUNT_FIELD_OFFSET != -1) {
    UNSAFE.putInt(mutable, STRING_COUNT_FIELD_OFFSET, chars.length);
  }
  return mutable;
}

代码示例来源：origin: prestodb/presto

private static int computeOffset(Field field) {
  if (Modifier.isStatic(field.getModifiers())) {
    return (int) VMSupport.U.staticFieldOffset(field);
  } else {
    return (int) VMSupport.U.objectFieldOffset(field);
  }
}

代码示例来源：origin: com.koloboke/koloboke-impl-jdk8

@Override
public void setValue(short value) {
  if (curKey != free) {
    if (expectedModCount == modCount()) {
      U.putShort(tab, INT_BASE + SHORT_VALUE_OFFSET + (((long) (index)) << INT_SCALE_SHIFT), value);
    } else {
      throw new java.util.ConcurrentModificationException();
    }
  } else {
    throw new java.lang.IllegalStateException();
  }
}

代码示例来源：origin: com.koloboke/koloboke-impl-jdk8

@Override
public void setValue(float value) {
  if (curKey != free) {
    if (expectedModCount == modCount()) {
      U.putInt(tab, LONG_BASE + FLOAT_VALUE_OFFSET + (((long) (index)) << LONG_SCALE_SHIFT), Float.floatToIntBits(value));
    } else {
      throw new java.util.ConcurrentModificationException();
    }
  } else {
    throw new java.lang.IllegalStateException();
  }
}

代码示例来源：origin: com.koloboke/koloboke-impl-jdk8

@Override
public void setValue(byte value) {
  if (curKey != free) {
    if (expectedModCount == modCount()) {
      U.putByte(tab, CHAR_BASE + BYTE_VALUE_OFFSET + (((long) (index)) << CHAR_SCALE_SHIFT), value);
    } else {
      throw new java.util.ConcurrentModificationException();
    }
  } else {
    throw new java.lang.IllegalStateException();
  }
}

代码示例来源：origin: google/guava

@Override
 public void putLongLittleEndian(byte[] array, int offset, long value) {
  theUnsafe.putLong(array, (long) offset + BYTE_ARRAY_BASE_OFFSET, value);
 }
},

代码示例来源：origin: netty/netty

static byte getByte(byte[] data, int index) {
  return UNSAFE.getByte(data, BYTE_ARRAY_BASE_OFFSET + index);
}

代码示例来源：origin: netty/netty

static void putByte(byte[] data, int index, byte value) {
  UNSAFE.putByte(data, BYTE_ARRAY_BASE_OFFSET + index, value);
}

代码示例来源：origin: netty/netty

static void putShort(byte[] data, int index, short value) {
  UNSAFE.putShort(data, BYTE_ARRAY_BASE_OFFSET + index, value);
}

代码示例来源：origin: netty/netty

static short getShort(long address) {
  return UNSAFE.getShort(address);
}

代码示例来源：origin: google/guava

@Override
void putNext(Waiter waiter, Waiter newValue) {
 UNSAFE.putObject(waiter, WAITER_NEXT_OFFSET, newValue);
}

代码示例来源：origin: netty/netty

static long objectFieldOffset(Field field) {
  return UNSAFE.objectFieldOffset(field);
}

代码示例来源：origin: com.koloboke/koloboke-impl-jdk8

@Override
public void setValue(short value) {
  if (curKey != free) {
    if (expectedModCount == modCount()) {
      U.putShort(tab, INT_BASE + SHORT_VALUE_OFFSET + (((long) (index)) << INT_SCALE_SHIFT), value);
    } else {
      throw new java.util.ConcurrentModificationException();
    }
  } else {
    throw new java.lang.IllegalStateException();
  }
}

代码示例来源：origin: com.koloboke/koloboke-impl-jdk8

@Override
public void setValue(int value) {
  if (curKey != FREE_BITS) {
    if (expectedModCount == modCount()) {
      U.putInt(tab, LONG_BASE + INT_VALUE_OFFSET + (((long) (index)) << LONG_SCALE_SHIFT), value);
    } else {
      throw new java.util.ConcurrentModificationException();
    }
  } else {
    throw new java.lang.IllegalStateException();
  }
}

代码示例来源：origin: netty/netty

static void putLong(byte[] data, int index, long value) {
  UNSAFE.putLong(data, BYTE_ARRAY_BASE_OFFSET + index, value);
}

代码示例来源：origin: netty/netty

static byte getByte(long address) {
  return UNSAFE.getByte(address);
}