Talha Malik

StringBuilder “append()” method appends string representation of passed argument to sequence and appends boolean, int, float, double, char, string, etc values.

Java Multithreading enables concurrent execution of two or more code parts to use maximum CPU and can be done by extending Thread class or Runnable interface.

Method parameters act as variables specified after method’s name within parentheses and are used to initialize values of primitive and non-primitive data types.

Boolean refers to a primitive data type that comprises two return values i.e., “true” or “false” and to declare a boolean in Java, “boolean” keyword is used.

XOR in Java is a bitwise operator that takes two boolean operands and returns true or 1 if they are different whereas on same operands, it returns false or 0.

DecimalFormat is a subclass of “NumberFormat” class in Java that formats decimal numbers using specific formatting pattern. These patterns can be “#”, “.”, “,”.

In Java, an element can be added to an array by creating a new array, using “ArrayList” or via the “System.arrayCopy()” method.

The var keyword in Java is a way to declare different data types like strings, integers, etc. in Java without explicitly defining these data types