how to concatenate variables into a variable with java

Question

I would like to concatenate a few variables into a string variable but I am unable to get it to work. When I compile it says \"not a statement\" and \"; expected.\"

Answer 1

String resW = a + " + " + b;

try this..

Answer 2

Instead of using resW, you could try this:

public class QuickTester {

    public static void main(String[] args) {

        float a = 1;
        float b = 2;

        System.out.println(String.format("%.0f + %.0f", a, b));
        System.out.println(String.format("%.2f + %.2f", a, b));
        System.out.println(String.format("%.5f + %.5f", a, b));
    }
}

Output:

1 + 2
1.00 + 2.00
1.00000 + 2.00000

Note:

• If you insist, you could do something like String resW = String.format(...);
• String#format can help you 'beautify' your resulting string, allowing you to specify the number of decimal places, alignment, etc

Answer 3

resW = a + " + " + b;

Use a plus sign to concatenate Strings.

It should allow an autoconversion from float to String, but if it doesn't, you can change the floats to Floats, and do:

resW = a.toString() + " + " + b.toString();