/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
public class InstField {
public boolean mBoolean1, mBoolean2;
public byte mByte1, mByte2;
public char mChar1, mChar2;
public short mShort1, mShort2;
public int mInt1, mInt2;
public float mFloat1, mFloat2;
public long mLong1, mLong2;
public double mDouble1, mDouble2;
public volatile long mVolatileLong1, mVolatileLong2;
public void run() {
assignFields();
checkFields();
InstField.nullCheck(null);
}
/*
* Check access to instance fields through a null pointer.
*/
static public void nullCheck(InstField nully) {
System.out.println("InstField.nullCheck");
try {
int x = nully.mInt1;
assert(false);
} catch (NullPointerException npe) {
// good
}
try {
long l = nully.mLong1;
assert(false);
} catch (NullPointerException npe) {
// good
}
try {
nully.mInt1 = 5;
assert(false);
} catch (NullPointerException npe) {
// good
}
try {
nully.mLong1 = 17L;
assert(false);
} catch (NullPointerException npe) {
// good
}
}
public void assignFields() {
System.out.println("InstField assign...");
mBoolean1 = true;
mBoolean2 = false;
mByte1 = 127;
mByte2 = -128;
mChar1 = 32767;
mChar2 = 65535;
mShort1 = 32767;
mShort2 = -32768;
mInt1 = 65537;
mInt2 = -65537;
mFloat1 = 3.1415f;
mFloat2 = -1.0f / 0.0f; // -inf
mLong1 = 1234605616436508552L; // 0x1122334455667788
mLong2 = -1234605616436508552L;
mDouble1 = 3.1415926535;
mDouble2 = 1.0 / 0.0; // +inf
mVolatileLong1 = mLong1 - 1;
mVolatileLong2 = mLong2 + 1;
}
public void checkFields() {
System.out.println("InstField check...");
assert(mBoolean1);
assert(!mBoolean2);
assert(mByte1 == 127);
assert(mByte2 == -128);
assert(mChar1 == 32767);
assert(mChar2 == 65535);
assert(mShort1 == 32767);
assert(mShort2 == -32768);
assert(mInt1 == 65537);
assert(mInt2 == -65537);
assert(mFloat1 > 3.141f && mFloat1 < 3.142f);
assert(mFloat2 < mFloat1);
assert(mLong1 == 1234605616436508552L);
assert(mLong2 == -1234605616436508552L);
assert(mDouble1 > 3.141592653 && mDouble1 < 3.141592654);
assert(mDouble2 > mDouble1);
assert(mVolatileLong1 == 1234605616436508551L);
assert(mVolatileLong2 == -1234605616436508551L);
}
}