How do I convert primitive data types into String?

There are times when we want to do a data conversion from other primitive data types into string expression, for instance when we want to format the screen output or simply mixing it with other string. Using a various static method String.valueOf() we can get a string value of them.

Here is the code sample:

package org.kodejava.example.lang;

public class StringValueOfExample {
    public static void main(String[] args) {
        boolean b = false;
        char c = 'c';
        int i = 100;
        long l = 100000;
        float f = 3.4f;
        double d = 500.99;

        System.out.println("b = " + String.valueOf(b));
        System.out.println("c = " + String.valueOf(c));
        System.out.println("i = " + String.valueOf(i));
        System.out.println("l = " + String.valueOf(l));
        System.out.println("f = " + String.valueOf(f));
        System.out.println("d = " + String.valueOf(d));
    }
}

When called with boolean argument the String.valueOf() method return true or false string depending on the boolean argument value. When called with char argument, a 1 length sized string returned.

For int, long, float, double the results are the same as calling Integer.toString(), Long.toString(), Float.toString() and Double.toString() respectively.

The result of this program execution is:

b = false
c = c
i = 100
l = 100000
f = 3.4
d = 500.99

Wayan Saryada

Programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, Hibernate / JPA.

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