String Methods - Java

charAt()

returns the character at a specified index

What would the code return?

String myStr = "Hello";
char result = myStr.charAt(0);
System.out.println(result);

H

codePointAt()

returns the Unicode of a character at a specified index

What would the code return?

String myStr = "Hello";
int result = myStr.codePointAt(0);
System.out.println(result);

72

codePointBefore()

returns the Unicode of a character before the specified index

What would the code return?

String myStr = "Hello";
int result = myStr.codePointBefore(1);
System.out.println(result);

72

codePointCount()

returns the number of Unicode values found in a string

What would the code return?

String myStr = "Hello";
int result = myStr.codePointCount(0, 5);
System.out.println(result);

5

compareTo()

compares two strings lexicographically.

What would the code return?

String myStr1 = "Hello";
String myStr2 = "Hello";
System.out.println(myStr1.compareTo(myStr2));

0

compareToIgnoreCase()

compares two strings lexicographically, ignoring case differences

What would the code return?

String myStr1 = "HELLO";
String myStr2 = "hello";
System.out.println(myStr1.compareToIgnoreCase(myStr2));

0

concat()

contains()

checks whether a string contains a character sequence

What would the code return?

String myStr = "Hello";
System.out.println(myStr.contains("Hel"));   // true
System.out.println(myStr.contains("e"));     // true
System.out.println(myStr.contains("Hi"));    // false

true

true

false

format()

What would the code return?

getChars()

What would the code return?

indexOf()

What would the code return?

isEmpty()

What would the code return?

join()

What would the code return?

length()

What would the code return?

split()

What would the code return?

substring()

What would the code return?

subSequence()

What would the code return?

toLowerCase()

What would the code return?

toUpperCase()

What would the code return?

toString()

What would the code return?

trim()

What would the code return?