Practice how to convert numeric string data to integer, float or double type in Java

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import java.math.BigDecimal;

public class ExampleApp {

    public static void main(String[] args) {
        
        // Convert string to integer
        int outputInteger;
        String stringVariable = "1225"; // this string data will be converted as it has number digits
        try {
            outputInteger = Integer.parseInt(stringVariable);
            System.out.println(outputInteger + 25); // 25 added to the integer. Output will be 1250
        } 
        catch (NumberFormatException e) {
            System.out.println(stringVariable + " cannot be converted to integer.");
        }

        // Convert string to float
        float outputFloat;
        String stringVariableNum = "75.25"; // this string data will be converted to a float
        try {
            outputFloat = Float.parseFloat(stringVariableNum);
            System.out.println(outputFloat + 12.46f); // 12.46 added, output will be 87.71
        } 
        catch (NumberFormatException e) {
            System.out.println(stringVariableNum + " cannot be converted to float.");
        }
      
        // Convert string to double
        double outputDouble;
        String stringNewVariable = "1225.25"; // this string data will be converted to a double
        try {
            outputDouble = Double.parseDouble(stringNewVariable);
            System.out.println(outputDouble + 12.46); // 12.46 added, output will be 1237.71
        } 
        catch (NumberFormatException e) {
            System.out.println(stringNewVariable + " cannot be converted to double.");
        }

        // Another example with non-numeric string
        int outputInteger2;
        String stringVariable2 = "T1225"; // this string data will not be converted as it contains non-numeric characters
        try {
            outputInteger2 = Integer.parseInt(stringVariable2);
            System.out.println(outputInteger2 + 25);
        } 
        catch (NumberFormatException e) {
            System.out.println(stringVariable2 + " cannot be converted to integer.");
        }
    }
}