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What's wrong on my code? i can't even resolved it
This is a classic issue. When you read nextDouble(), the enter character at the end of the double will not be read in the double itself, but the next nextLine() will just read that enter character and will not allow you to type anything.
For your particular code, there are 2 ways to fix it
change the department and salary order, so that salary will be the last thing to read. Since you are not reading data in a loop, this should do it
If you want to read data in a loop, then only good solution will be read salary as nextLine() too, and use Double.parseDouble() to parse it to double. As double salary = Double.parseDouble(in.nextLine());
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Suppose I have a string
String string = "1.18";
I want to multiply the above string with another string that is
String f1= "2.54";
What would I have to do to multiply these two values? I looked this up online and came across a function called Integer.ParseInt() that converts the string to it's numerical values, so i tried
System.out.println(Integer.parseInt(string) * Integer.parseInt(f1));
It doesn't work. I want to know what am I doing wrong. What's the proper way of doing it? I would find it very helpful if someone could help me understand, thanks!
Try Double.parseDouble(string)
Integer is not for decimal number. Use Double.parseDouble() or use BigDecimal type if you need exact result.
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So I'm working on a school project and it includes a Combined Gas Law calculator where the user may input the temperature in °celsius (e.g. 1°C) and the code converts it to kelvin; if the user's input is in kelvin already, it does not do that and continues with the equation. So does anyone know how I can separate the two data types into two different variables in Java?
You could split over a specific string (degree character for example), store in a String array and parse the first element. Something like this:
String str = "47°C"
String[] strArray = str.split("°");
int number = Integer.parseInt(strArray[0]);
Congratulations, you are working on something but not writing it's code. I can tell you a few tips about how to implement it's code.
You have a string that has some numbers in it, and also has unit. Try searching 'How to extract numbers from a string'. Now you have a number.
Find the unit in the string by looking the last character in the string.
If the condition is ok for your homework, calculate the new value.
Print the result.
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For example, if I have a string (24/25), how would I go about being left with two double values of 24 and 25. My objective to to eventually, given a set of number of that form, divide each of them, and add to get the average. I'm fairly new to Java and I honestly am so confused as where to even begin. Thank you!
As Andreas said. First you need to take the substring between brackets. Use String.substr
Now split 24/25 to 24 and 25. You can use String.split
Then you can parse them with Double.parse
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I have a file "file.txt" in Java. In the file I have the following values:
10 10
3 3 W
MMMMMRM
4 4 R
LRLRLML
I want to read each line and with each character I want to assign them to a variable which I will use for calculation.
Any idea with how I can proceed with?
Thanks
1) You can use a BufferedReader with the readLine() method to read each line.
2) Then you can use split() for each word or toCharArray() for each character.
3) Then assign said character to predefined variables.
It would be helpful if we could see what you've tried so far or if you could give more details on what you are trying to accomplish.
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it is possible to assign that big number in java? i need to make a calculation of 39 digits value. could any help? Thanks
Problem:
Consider the following composite number:
340282367237851113557325445936183246849
Write a Java method to find two numbers whose product is the above number.
I guess you need to check out the BigInteger of the java API. That might be able to store your results of those much big numbers. Read the documentation,
http://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html