How to convert a double to a string in java

How do you convert a double to a string?

Convert double to string in Java using toString() method of Double wrapper class. public String toString( ) : This is the another method that can be used to convert double to String. This method returns a string representation of the Double object.

What happens when you add a double value to a string?

The result of adding a double value to a string is a “string object” . When we add double value to a string the value gets converted and it is appends to the original string and hence a new string object is created.

Can we convert list to string in Java?

We can use StringBuilder class to convert List to String. … We can add elements in the object of StringBuilder using the append() method while looping and then convert it into string using toString() method of String class at the end.

Can we convert string to long in Java?

Java – Convert String to long using Long. parseLong(String)

Long. parseLong(String): All the characters in the String must be digits except the first character, which can be a digit or a minus ‘-‘. For example – long var = Long. parseInt(“-123”); is allowed and the value of var after conversion would be -123.

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.
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How do I turn a string into an int?

We can convert String to an int in java using Integer. parseInt() method. To convert String into Integer, we can use Integer. valueOf() method which returns instance of Integer class.

How do you input a double in Java?

Example 4

  1. import java.util.*;
  2. public class ScannerNextDoubleExample4 {
  3. public static void main(String args[]){
  4. double value;
  5. Scanner scan = new Scanner(System.in);
  6. System.out.print(“Enter the numeric value : “);
  7. value = scan.nextDouble();
  8. System.out.println(“Double value : ” + value +” nTwice value : ” + 2.0*value );

How do I turn a list into a string?

  1. import java. util. Arrays;
  2. import java. util. List;
  3. public static void main(String[] args)
  4. List<Character> chars = Arrays. asList(‘T’, ‘e’, ‘c’, ‘h’, ‘i’, ‘e’);
  5. String string = chars. toString()
  6. . substring(1, 3*chars. size()-1)
  7. . replaceAll(“, “, “”);
  8. System. out. println(string);

Can we convert StringBuilder to string in Java?

To convert a StringBuilder to String value simple invoke the toString() method on it. Instantiate the StringBuilder class. Append data to it using the append() method. Convert the StringBuilder to string using the toString() method.

What is string join in Java?

The java string join() method returns a string joined with given delimiter. In string join method, delimiter is copied for each elements. In case of null element, “null” is added. The join() method is included in java string since JDK 1.8. There are two types of join() methods in java string.

What is long parseLong in Java?

Java Long parseLong() Method. The parseLong() method of Java Long class is used to parse the CharSequence argument as a signed long with the specified radix , beginning at a specified beginIndex and extending to endIndex-1.

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How do you compare two long values in Java?

There are following ways to do it.

  1. type cast both objects into primitive values and compare (long)val3 == (long)val4.
  2. read value of object and compare val3. longValue() == val4. longValue()
  3. Use equals() method on object comparison.

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