Java – Round Double To Two Decimal Places

Round a double value to a given number of decimal places.

double longNumber = 25.3713789;

// TWO DECIMAL PLACES
DecimalFormat df = new DecimalFormat(“0.0#”);
String roundedNumber = df.format(longNumber);
System.out.println(roundedNumber);

// THREE DECIMAL PLACES
df = new DecimalFormat(“0.00#”);
roundedNumber = df.format(longNumber);
System.out.println(roundedNumber);

 

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JAVA – How To Convert Integer (INT) To Hexidecimal (HEX)

Integer to Hexidecimal string:

int intVal = 123;
String hexVal = Integer.toHexString(intVal);
System.out.println(“Hexidecimal: ” + hexVal);

Output:

Hexidecimal: 7b

Hexidecimal string to Integer:

String hexVal = “7b”;
int intVal = Integer.parseInt(hexVal,16);
System.out.println(“Integer: ” + intVal);Output:

Output:

Integer: 123