Welcome to DrJava.  Working directory is C:\Users\rlkraft.PNW
> "hello".length()
5
> "cat".toUpperCase()
"CAT"
> 
> int x = 6
> x
6
> String s = "dog"
> s
"dog"
> String s1 = "dog";
> s1.length()
3
> s1.toUpperCase()
"DOG"
> s1
"dog"
> String s2 = "Hello"
> s2.charAt(3)
'l'
> s2.charAt(4)
'o'
> s2.charAt(5)
java.lang.StringIndexOutOfBoundsException: String index out of range: 5
        at java.lang.String.charAt(String.java:658)
> s2.charAt(0)
'H'
> for (int i = 0; i < s2.length(); i ++) System.out.print( s2.charAt(i) );
Hello> for (int i = 0; i < s2.length(); i ++) System.out.println( s2.charAt(i) );
H
e
l
l
o
> s2 = "This is a longer string."
"This is a longer string."
> for (int i = 0; i < s2.length(); i ++) System.out.println( s2.charAt(i) );
T
h
i
s
 
i
s
 
a
 
l
o
n
g
e
r
 
s
t
r
i
n
g
.
> 
> s1
"dog"
> s1.endsWith("og")
true
> s1.endsWith("g")
true
> s1.endsWith("s")
false
> s1.startsWith("s")
false
> s1.startsWith("d")
true
> s1.startsWith("do")
true
> s1.startsWith("dog")
true
> s1.startsWith("dogs")
false
> s1.charAt(2)
'g'
>