Add project

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdk 32
+
+    defaultConfig {
+        applicationId "com.example.os_project"
+        minSdk 24
+        targetSdk 32
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+
+    implementation 'androidx.appcompat:appcompat:1.4.1'
+    implementation 'com.google.android.material:material:1.5.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/os_project/ExampleInstrumentedTest.java

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+package com.example.os_project;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.example.os_project", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.os_project">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.OS_Project">
+        <activity
+            android:name=".Second"
+            android:exported="false" />
+        <activity
+            android:name=".First"
+            android:exported="false" />
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/os_project/C_LOOK.java

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+package com.example.os_project;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+public class C_LOOK {
+    private String direction;
+    private int max;
+    private int head_place;
+    private String name;
+    private ArrayList<Integer> disks = new ArrayList<Integer>();
+    private int moving_time;
+    public  ArrayList<Integer> changing_disk = new ArrayList<Integer>();
+    public  ArrayList<Integer> less_disks = new ArrayList<Integer>();
+    public  ArrayList<Integer> big_disks = new ArrayList<Integer>();
+    public ArrayList<Integer> result = new ArrayList<Integer>();
+    public int time = 0;
+
+    public C_LOOK(String direction, int max, int head_place, String name, ArrayList<Integer> disks, int moving_time) {
+        this.direction = direction;
+        this.max = max;
+        this.head_place = head_place;
+        this.name = name;
+        this.disks = disks;
+        this.moving_time = moving_time;
+    }
+
+    public void copy_disk(){
+        this.changing_disk = this.disks;
+
+    }
+
+    public String print_result(){
+        String toPrint = "";
+        for(int i = 0; i < result.size(); i++){
+            if (i != result.size() -1)
+                toPrint = toPrint + String.valueOf(result.get(i)) + " -> ";
+            else{
+                toPrint = toPrint + String.valueOf(result.get(i));
+            }
+        }
+        return toPrint;
+
+    }
+
+    public int printTime() {
+        return time;
+    }
+
+    public void ascendingScan(){
+        int current_head = head_place;
+        for(int i = 0; i<big_disks.size(); i++){
+            time = time + moving_time*Math.abs(current_head - big_disks.get(i));
+            result.add(big_disks.get(i));
+            current_head = big_disks.get(i);
+        }
+        current_head = less_disks.get(0);
+        result.add(less_disks.get(0));
+
+        for(int j = 1; j < less_disks.size() ; j++){
+            time = time + moving_time*Math.abs(current_head - less_disks.get(j));
+            result.add(less_disks.get(j));
+            current_head = less_disks.get(j);
+        }
+
+    }
+
+    public void descendingScan(){
+        int current_head = head_place;
+        for(int j = less_disks.size()-1; j > -1; j--){
+            time = time + moving_time*Math.abs(current_head - less_disks.get(j));
+            result.add(less_disks.get(j));
+            current_head = less_disks.get(j);
+        }
+
+        current_head = big_disks.get(big_disks.size() - 1);
+        result.add(big_disks.get(big_disks.size() - 1));
+
+        for(int i = big_disks.size() - 2; i > -1; i--){
+            time = time + moving_time*Math.abs(current_head - big_disks.get(i));
+            result.add(big_disks.get(i));
+            current_head = big_disks.get(i);
+        }
+
+
+
+    }
+
+    public void algorithm(){
+        result.add(head_place);
+        copy_disk();
+        Collections.sort(changing_disk);
+        for(int i=0; i<changing_disk.size(); i++){
+            if (changing_disk.get(i) < head_place)
+                less_disks.add(changing_disk.get(i));
+            else{
+                big_disks.add(changing_disk.get(i));
+            }
+        }
+
+        if ((direction.toUpperCase()).equals("UP"))
+            ascendingScan();
+        else if((direction.toUpperCase()).equals("DOWN")){
+            descendingScan();
+        }
+
+    }
+}

app/src/main/java/com/example/os_project/C_SCAN.java

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+package com.example.os_project;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+public class C_SCAN {
+    private String direction;
+    private int max;
+    private int head_place;
+    private String name;
+    private ArrayList<Integer> disks = new ArrayList<Integer>();
+    private int moving_time;
+    public ArrayList<Integer> changing_disk = new ArrayList<Integer>();
+    public  ArrayList<Integer> less_disks = new ArrayList<Integer>();
+    public  ArrayList<Integer> big_disks = new ArrayList<Integer>();
+    public ArrayList<Integer> result = new ArrayList<Integer>();
+    public int time = 0;
+
+    public C_SCAN(String direction, int max, int head_place, String name, ArrayList<Integer> disks, int moving_time) {
+        this.direction = direction;
+        this.max = max;
+        this.head_place = head_place;
+        this.name = name;
+        this.disks = disks;
+        this.moving_time = moving_time;
+    }
+
+    public void copy_disk(){
+        this.changing_disk = this.disks;
+
+    }
+
+    public String print_result(){
+        String toPrint = "";
+        for(int i = 0; i < result.size(); i++){
+            if (i != result.size() -1)
+                toPrint = toPrint + String.valueOf(result.get(i)) + " -> ";
+            else{
+                toPrint = toPrint + String.valueOf(result.get(i));
+            }
+        }
+        return toPrint;
+
+    }
+
+    public int printTime() {
+        return time;
+    }
+
+    public void ascendingScan(){
+        int current_head = head_place;
+        for(int i = 0; i<big_disks.size(); i++){
+            time = time + moving_time*Math.abs(current_head - big_disks.get(i));
+            result.add(big_disks.get(i));
+            current_head = big_disks.get(i);
+        }
+        time = time + moving_time*Math.abs(current_head - (max - 1));
+        result.add(max - 1);
+        current_head = 0;
+        result.add(0);
+
+        for(int j = 0; j < less_disks.size() ; j++){
+            time = time + moving_time*Math.abs(current_head - less_disks.get(j));
+            result.add(less_disks.get(j));
+            current_head = less_disks.get(j);
+        }
+
+    }
+
+    public void descendingScan(){
+        int current_head = head_place;
+        for(int j = less_disks.size()-1; j > -1; j--){
+            time = time + moving_time*Math.abs(current_head - less_disks.get(j));
+            result.add(less_disks.get(j));
+            current_head = less_disks.get(j);
+        }
+        time = time + moving_time*Math.abs(current_head - 0);
+        result.add(0);
+        current_head = max - 1;
+        result.add(max-1);
+
+        for(int i = big_disks.size() - 1; i > -1; i--){
+            time = time + moving_time*Math.abs(current_head - big_disks.get(i));
+            result.add(big_disks.get(i));
+            current_head = big_disks.get(i);
+        }
+
+
+
+    }
+
+    public void algorithm(){
+        result.add(head_place);
+        copy_disk();
+        Collections.sort(changing_disk);
+        for(int i=0; i<changing_disk.size(); i++){
+            if (changing_disk.get(i) < head_place)
+                less_disks.add(changing_disk.get(i));
+            else{
+                big_disks.add(changing_disk.get(i));
+            }
+        }
+
+        if ((direction.toUpperCase()).equals("UP"))
+            ascendingScan();
+        else if((direction.toUpperCase()).equals("DOWN")){
+            descendingScan();
+        }
+
+    }
+}