Quick Answer: How To Convert A Double To An Int In Java?

How do you convert a double to an int in Java?

How to convert a double to int in Java

  1. Typecasting. Since double is a bigger data type than int, it needs to be down-casted. See the syntax below: int IntValue = ( int ) DoubleValue;
  2. Using Math. round() Math. round() accepts a double value and converts it into the nearest long value by adding. 0. 5 0.5. 5 to the value and truncating its decimal points.

Can a double be converted to int?

Since double is bigger data type than int, you can simply downcast double to int in Java. double is 64-bit primitive value and when you cast it to a 32-bit integer, anything after the decimal point is lost.

How do you convert to int in Java?

Java String to Int – How to Convert a String to an Integer

  1. Use Integer. parseInt() to Convert a String to an Integer. This method returns the string as a primitive type int. If the string does not contain a valid integer then it will throw a NumberFormatException.
  2. Use Integer. valueOf() to Convert a String to an Integer. This method returns the string as an integer object.
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How do you round off a double in Java?

1 Answer

  1. double roundOff = Math. round (a * 100.0) / 100.0; Output is.
  2. 123.14. Or.
  3. double roundOff = ( double ) Math. round (a * 100) / 100; this will do it for you as well.

Can we convert double to string in Java?

We can convert double to String in java using String. valueOf() and Double. toString() methods.

Can we convert int to float in Java?

The java. floatValue() method of Integer class of java. lang package is used to convert the value of the given Integer to a float type after a widening primitive conversion.

How do you convert an int to a double?

Let’s see the simple code to convert int to Double in java.

  1. public class IntToDoubleExample2{
  2. public static void main(String args[]){
  3. int i=100;
  4. Double d= new Double (i);//first way.
  5. Double d2= Double.valueOf(i);//second way.
  6. System.out.println(d);
  7. System.out.println(d2);
  8. }}

How do you convert long to int?

Let’s see the simple code to convert Long to int in java.

  1. public class LongToIntExample2{
  2. public static void main(String args[]){
  3. Long l= new Long (10);
  4. int i=l.intValue();
  5. System.out.println(i);
  6. }}

How do you convert to int?

Java int to String Example using Integer. toString()

  1. public class IntToStringExample2{
  2. public static void main(String args[]){
  3. int i=200;
  4. String s= Integer.toString(i);
  5. System.out.println(i+100);//300 because + is binary plus operator.
  6. System.out.println(s+100);//200100 because + is string concatenation operator.
  7. }}

How do I convert an int to a string in Java?

Common ways to convert an integer

  1. The toString() method. This method is present in many Java classes.
  2. String.valueOf() Pass your integer (as an int or Integer ) to this method and it will return a string:
  3. StringBuffer or StringBuilder. These two classes build a string by the append() method.
  4. Indirect ways.
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How do I convert a char to a string in Java?

Convert Char To String

  1. public class CharToString_toString {
  2. public static void main( String [] args) {
  3. //input character variable.
  4. char myChar = ‘g’;
  5. //Using toString() method.
  6. //toString method take character parameter and convert string.
  7. String myStr = Character. toString(myChar);
  8. //print string value.

Can a number be a char in Java?

According to the Java Primitive Data Types tutorial: char: The char data type is a single 16-bit Unicode character. So yes, it is a 16-bit unsigned integer. Whether you use the type to represent a number or a character is up to you

How do you round a double to 2 decimal places in Java?

You can convert double or float to BigDecimal and use setScale() method to round double /float to 2 decimal places.

How do you round to 2 decimal places?

Rounding to decimal places

  1. look at the first digit after the decimal point if rounding to one decimal place or the second digit for two decimal places.
  2. draw a vertical line to the right of the place value digit that is required.
  3. look at the next digit.
  4. if it’s 5 or more, increase the previous digit by one.

How do you convert double to 2 decimal places in Java?

7 ways to format double to 2 decimal places in java

  1. Using String’s format() method.
  2. Using System.out.printf.
  3. Using Formatter.
  4. Using BigDecimal.
  5. Using DecimalFormat.
  6. Using NumberFormat.
  7. Using Apache common library.

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