Java Programming Write code to evaluate the physical state of multiple types of

Question

Java Programming

Write code to evaluate the physical state of multiple types of matter at a given temperature (and sea level pressure). You will need to replace line 3 in this repl with your actual code.

Your program should

prompt the user with this string: "Enter a type of matter (water, hydrogen, mercury):"

read a String type of matter from System.in

prompt the user with this string: "Enter a decimal number as temperature (degrees C):"

read a decimal temperature from System.in

depending on the inputs, output a String describing the state of matter at that temperature using the following rules

For water:

Temp is 0 or below --> "solid"

Temp is between 0 and 100 (but not equal) --> "liquid"

Temp is 100 or above --> "gas"

For hydrogen:

Temp is 259.16°C or below --> "solid"

Temp is between 259.16°C and 252.879°C (but not equal) --> "liquid"

Temp is 252.879°C or above --> "gas"

For mercury:

Temp is 38.829°C or below --> "solid"

Temp is between 38.829°C and 356.619°C (but not equal) --> "liquid"

Temp is 356.619°C or above --> "gas"

For any other types of matter:

Output "I don't know about that material." with newline.

Explanation / Answer

import java.io.*;

import java.util.*;

public class Solution {

static String temperature(String str, float num) {

String res;

switch(str){

case "water": if(num <= 0)

res = "solid";

else if (num<100)

res = "liquid";

else

res = "gas";

break;

case "hydrogen": if(num <= -259.16)

res = "solid";

else if (num < -252.879)

res = "liquid";

else

res = "gas";

break;

case "mercury": if(num <= -38.829)

res = "solid";

else if (num < 356.619 )

res = "liquid";

else

res = "gas";

break;

default :

res = "I don't know about that material";

};

return res;

}

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

String str, result;

float num;

System.out.println("Enter a type of matter (water, hydrogen, mercury):");

str = in.next();

System.out.println("Enter a decimal number as temperature (degrees C):");

num = in.nextFloat();

result = temperature(str, num);

System.out.println(result);

}

}

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