src/org/nutz/repo/org/objectweb/asm/commons/GeneratorAdapter.java
public void unbox(final Type type) {
        Type t = NUMBER_TYPE;
        Method sig = null;
        switch (type.getSort()) {
        case Type.VOID:
            return;
        case Type.CHAR:
            t = CHARACTER_TYPE;
            sig = CHAR_VALUE;
            break;
        case Type.BOOLEAN:
            t = BOOLEAN_TYPE;
            sig = BOOLEAN_VALUE;
            break;
        case Type.DOUBLE:
            sig = DOUBLE_VALUE;
            break;
        case Type.FLOAT:
            sig = FLOAT_VALUE;
            break;
        case Type.LONG:
            sig = LONG_VALUE;
            break;
        case Type.INT:
        case Type.SHORT:
        case Type.BYTE:
            sig = INT_VALUE;
        }
        if (sig == null) {
            checkCast(type);
        } else {
            checkCast(t);
            invokeVirtual(t, sig);
        }
    }
public void unbox(final Type type) {
        Type t = NUMBER_TYPE;
        Method sig = null;
        switch (type.getSort()) {
        case Type.VOID:
            return;
        case Type.CHAR:
            t = CHARACTER_TYPE;
            sig = CHAR_VALUE;
            break;
        case Type.BOOLEAN:
            t = BOOLEAN_TYPE;
            sig = BOOLEAN_VALUE;
            break;
        case Type.DOUBLE:
            sig = DOUBLE_VALUE;
            break;
        case Type.FLOAT:
            sig = FLOAT_VALUE;
            break;
        case Type.LONG:
            sig = LONG_VALUE;
            break;
        case Type.INT:
        case Type.SHORT:
        case Type.BYTE:
            sig = INT_VALUE;
        }
        if (sig == null) {
            checkCast(type);
        } else {
            checkCast(t);
            invokeVirtual(t, sig);
        }
    }
Generates the instructions to unbox the top stack value. This value is
replaced by its unboxed equivalent on top of the stack.

@param type
the type of the top stack value.