Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question

Write a class RangeInput that allows users to enter a value within a range of values that is provided in the constructor. An example would be a temperature control switch in a car that allows inputs between 60 and 80 degrees Fahrenheit. The input control has “up” and “down” buttons. Provide up and down methods to change the current value. The initial value is the midpoint between the limits. As with the preceding exercises, use Math.min and Math.max to limit the value. Write a sample program that simulates clicks on controls for the passenger and driver seats.

Please ensure that it works with the test class provided.

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public class RangeInput{
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private int currentValue;
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private int highValue;
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private int lowValue;
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public RangeInput(int high, int low){
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// this is the constructor
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// your code here
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public vsoid up(){
// this is a mutator method
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// that increases currentValue if allowed
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// your code here
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// imagine high vlaue is 50 and currentValue is 40
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}
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public void down () {
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// this is a mutator method
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// that decreases currentValue if allowed
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// your code here
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}
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public int getCurrentValue (){
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// this is an accessor method
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// your code here
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}
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}
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Transcribed Image Text:10 11 public class RangeInput{ 12 13 private int currentValue; 14 private int highValue; 15 private int lowValue; 16 17 public RangeInput(int high, int low){ 18 // this is the constructor 19 // your code here 20 21 22 public vsoid up(){ // this is a mutator method 23 24 25 // that increases currentValue if allowed 26 // your code here 27 28 // imagine high vlaue is 50 and currentValue is 40 29 30 31 32 33 } 34 35 public void down () { 36 // this is a mutator method 37 // that decreases currentValue if allowed 38 // your code here 39 40 41 42 43 44 } 45 46 public int getCurrentValue (){ 47 // this is an accessor method 48 // your code here 49 50 } 51 52 53 54 }
public class RangeInputTester{
public static void main(String[] args){
RangeInput myInput = new RangeInput (30,20);
System.out.println("current value: " + myInput.getCurrentValue ());
for (int i=0;i<4;i++){
myInput.up();
}
System.out.println("new value: "
+ myInput.getCurrentValue ());
for (int i=0;i<50;i++){
myInput.down();
}
System.out.println("last value:
" + myInput.getCurrentValue ());
}
}
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Transcribed Image Text:public class RangeInputTester{ public static void main(String[] args){ RangeInput myInput = new RangeInput (30,20); System.out.println("current value: " + myInput.getCurrentValue ()); for (int i=0;i<4;i++){ myInput.up(); } System.out.println("new value: " + myInput.getCurrentValue ()); for (int i=0;i<50;i++){ myInput.down(); } System.out.println("last value: " + myInput.getCurrentValue ()); } }
Expert Solution
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Step 1

Given

The answer is given below.

CODE:-

import java.util.Scanner;

class RangeInput

{

static int lower,upper,current;

public RangeInput(int lower,int upper)

{

lower = lower;

upper = upper;

current = (upper-lower) / 2;

}

public static void input()

{

Scanner sc = new Scanner(System.in);

System.out.println("Enter temperature between %d and %d:",lower,upper);

int temp = sc.nextInt();

if(temp >= lower && temp <=upper)

current = temp;

else

System.out.println("Invalid temperature");

}

public static void up()

{

if(current < Math.max(upper,lower))

current++;

else

System.out.println("Reached Maximum");

}

public static void down()

{

if(current > Math.min(upper,lower))

current--;

else

System.out.println("Reached Minimum");

}

}

 

 

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