String Length

String s = "This";
System.out.println(s.length());

String t = "This \"is\" that";
System.out.println(t.length());

String Length

String s = "This";
System.out.println(s.length());  // 4

String t = "This \"is\" that";
System.out.println(t.length());

String Length

String s = "This";
System.out.println(s.length());  // 4

String t = "This \"is\" that";
System.out.println(t.length());

String Length

String s = "This";
System.out.println(s.length());  // 4

String t = "This \"is\" that";
System.out.println(t.length());  // 14

String Comparison

String s1 = "This";
String s2 = "This";
String s3 = "this";

System.out.println(s1 == s2);
System.out.println(s1 == s3);

String Comparison

String s1 = "This";
String s2 = "This";
String s3 = "this";

System.out.println(s1 == s2); // false
System.out.println(s1 == s3); // false

String Comparison

String s1 = "This";
String s2 = "This";
String s3 = "this";

System.out.println(s1 == s2); // false
System.out.println(s1 == s3); // false

System.out.println(s1.equals(s2));
System.out.println(s1.equals(s3)); 

String Comparison

String s1 = "This";
String s2 = "This";
String s3 = "this";

System.out.println(s1 == s2); // false
System.out.println(s1 == s3); // false

System.out.println(s1.equals(s2)); // true
System.out.println(s1.equals(s3)); // false

String Comparison

String s1 = "This";
String s2 = "That";

if(s1 < s2){
  System.out.println("s1 comes first");
}else{
  System.out.println("s2 comes first");
}

String Comparison

String s1 = "This";
String s2 = "That";

if(s1 < s2){
  System.out.println("s1 comes first");
}else{
  System.out.println("s2 comes first");
}

String Comparison

String s1 = "This";
String s2 = "That";

if(s1 < s2){
  System.out.println("s1 comes first");
}else{
  System.out.println("s2 comes first");
}

String Comparison

String s1 = "This";
String s2 = "That";

if(s1.compareTo(s2) < 0){
  System.out.println("s1 comes first");
}else{
  System.out.println("s2 comes first");
}

String Concatenation

String s1 = "This";
String s2 = "That";
int x = 42;

String s3 = s1 + s2;
String s4 = "" + x;

System.out.println(s3);
System.out.println(s4);

String Concatenation

String s1 = "This";
String s2 = "That";
int x = 42;

String s3 = s1 + s2;
String s4 = "" + x;

System.out.println(s3);
System.out.println(s4);

String Concatenation

String s1 = "This";
String s2 = "That";
int x = 42;

String s3 = s1 + s2;
String s4 = "" + x;

System.out.println(s3);  // "ThisThat"
System.out.println(s4);

String Concatenation

String s1 = "This";
String s2 = "That";
int x = 42;

String s3 = s1 + s2;
String s4 = "" + x;

System.out.println(s3);  // "ThisThat"
System.out.println(s4);  // "42"

Searching Strings

• contains
• indexOf
• lastIndexOf
• startsWith
• endsWith

Manipulating Strings

• replace
• substring
• toLowerCase
• toUppercase
• trim
• charAt