Java Quick Reference

Constructs a new string object that represents the same sequence of characters as str

• String(String str)

• int length()

• String substring(int from, int to)

Answer explanation

This method will allow you to create a new String object.

Returns the number of characters in a String object

• int length()

• int long()

• int getLength()

• Integer(int value)

Answer explanation

This is used to get the length of a String object. It is not the same length method used on arrays.

Returns substring(from, length())

• String cutLength(String str)

• String substring(int from)

• String substring(int from, int to)

Answer explanation

This method will return a part of a string starting at the index indicated to the end of the string.

Returns the index of the first occurrence of a string, returns -1 if not found

• boolean equals(String other)

• int compareTo(String str)

• int numberOf(String str)

• int indexOf(String str)

Answer explanation

This returns the index number of the first letter of the string you are looking for.

Returns true if this is equal to other object, returns false if not equal

• int equals(String other)

• double equals(String other)

• boolean equals(String other)

• String equals(String other)

Constructs a new integer object, represents the specified int value

• Integer(int value)

• integer(int value)

• int x = value

Returns the smallest value of an integer

• getMinValue()

• Integer.MAX_VALUE

• Integer.MIN_VALUE

Returns the maximum value of an integer

• Integer.MAX_VALUE

• integer.MAX_VALUE

• INTEGER.max_value

returns the value of this Integer as an int

• Integer.indexOf()

• int intValue()

• Integer.MAX_Value

Constructs a new Double object

• double(int value)

• double x = 3.23

• Double(int value)