Initial Commit of my bit field demo
Signed-off-by: Ricky Barrette <rickbarrette@gmail.com>
This commit is contained in:
6
Java/Bit Fields/.classpath
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6
Java/Bit Fields/.classpath
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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="src" path="src"/>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
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<classpathentry kind="output" path="bin"/>
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</classpath>
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17
Java/Bit Fields/.project
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Java/Bit Fields/.project
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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>Bit Fields</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.jdt.core.javabuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.jdt.core.javanature</nature>
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</natures>
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</projectDescription>
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11
Java/Bit Fields/.settings/org.eclipse.jdt.core.prefs
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Java/Bit Fields/.settings/org.eclipse.jdt.core.prefs
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eclipse.preferences.version=1
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=1.7
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org.eclipse.jdt.core.compiler.debug.lineNumber=generate
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org.eclipse.jdt.core.compiler.debug.localVariable=generate
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org.eclipse.jdt.core.compiler.debug.sourceFile=generate
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.source=1.7
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124
Java/Bit Fields/src/com/test/BitField.java
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124
Java/Bit Fields/src/com/test/BitField.java
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/**
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* BitFieldDemo.java
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* @date Mar 16, 2012
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* @author ricky barrette
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* @author Twenty Codes, LLC
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*
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* Copyright 2012 Richard Barrette
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.test;
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/**
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* This is a simple bit field demo class
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* @author ricky barrette
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*/
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public class BitField {
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private int mFlags;
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public static final int FLAG_ONE = 1;
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public static final int FLAG_TWO = 2;
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public static final int FLAG_THREE = 4;
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public static final int FLAG_FOUR = 8;
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public static final int FLAG_FIVE = 16;
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public static final int FLAG_SIX = 32;
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public static final int FLAG_SEVEN = 64;
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public static final int FLAG_EIGHT = 128;
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/**
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* Creates a new BitFieldDemo
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* @author ricky barrette
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*/
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public BitField(){
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this(0);
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}
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/**
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* Creates a new BitFiledDemo
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* @param flags
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* @author ricky barrette
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*/
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public BitField(int flags) {
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setFlags(flags);
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}
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/**
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* @return the flags
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*/
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public int getFlags() {
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return new Integer(mFlags);
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}
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/**
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* @param flag being checked
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* @return true if the flag has been set
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* @author ricky barrette
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*/
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public boolean isFlagSet(int flag){
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return (this.mFlags & flag) > 0;
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}
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/**
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* Uses XOR logic to unset flags.
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* Warning: this will set flags if they are NOT already set
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* @param flags to be removed
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* @author ricky barrette
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*/
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public void removeFlags(int flags){
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if(flags < 0 || flags > 255)
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throw new IllegalArgumentException("Invald flags");
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this.mFlags = this.mFlags ^ flags;
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}
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/**
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* Uses OR logic to set flags
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* @param flags the flags to set
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* @author ricky barrette
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*/
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public void setFlags(int flags) {
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if(flags < 0 || flags > 255)
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throw new IllegalArgumentException("Invald flags");
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this.mFlags = this.mFlags | flags;
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}
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/**
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* (non-Javadoc)
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* @see java.lang.Object#toString()
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* @author ricky barrette
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*/
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@Override
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public String toString() {
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StringBuffer s = new StringBuffer();
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s.append("Flags = ");
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s.append(this.mFlags);
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s.append(", Bit 1 = ");
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s.append(isFlagSet(FLAG_ONE));
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s.append(", Bit 2 = ");
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s.append(isFlagSet(FLAG_TWO));
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s.append(", Bit 3 = ");
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s.append(isFlagSet(FLAG_THREE));
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s.append(", Bit 4 = ");
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s.append(isFlagSet(FLAG_FOUR));
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s.append(", Bit 5 = ");
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s.append(isFlagSet(FLAG_FIVE));
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s.append(", Bit 6 = ");
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s.append(isFlagSet(FLAG_SIX));
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s.append(", Bit 7 = ");
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s.append(isFlagSet(FLAG_SEVEN));
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s.append(", Bit 8 = ");
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s.append(isFlagSet(FLAG_EIGHT));
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return s.toString();
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}
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}
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73
Java/Bit Fields/src/com/test/Main.java
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73
Java/Bit Fields/src/com/test/Main.java
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/**
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* Main.java
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* @date Mar 16, 2012
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* @author ricky barrette
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* @author Twenty Codes, LLC
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*
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* Copyright 2012 Richard Barrette
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.test;
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/**
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* This class will be used to drive a class that uses bit fields
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* @author ricky barrette
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*/
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public class Main {
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/**
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* Creates a new Main instance
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* @author ricky barrette
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*/
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public Main() {
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/*
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* Create a new bit field with the 8th bit set
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*/
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BitField b = new BitField(BitField.FLAG_EIGHT);
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System.out.println(b.toString());
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/*
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* set the 4th and 7th bits
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*/
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b.setFlags(BitField.FLAG_FOUR | BitField.FLAG_SEVEN);
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System.out.println(b.toString());
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/*
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* un-set the 8th bit
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*/
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b.removeFlags(BitField.FLAG_EIGHT);
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System.out.println(b.toString());
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/*
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* set the first abd second bits
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*/
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b.setFlags(BitField.FLAG_ONE | BitField.FLAG_TWO);
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System.out.println(b.toString());
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/*
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* unset the fourth and sencond bit
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*/
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b.removeFlags(BitField.FLAG_FOUR | BitField.FLAG_TWO);;
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System.out.println(b.toString());
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}
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/**
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* This is the main method
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* @param args
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* @author ricky barrette
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*/
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public static void main(String[] args) {
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new Main();
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}
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}
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