Write the output for the following:

String s1 = "phoenix"; String s2 ="island";
System.out.println(s1.substring(0).concat(s2.substring(2)));
System.out.println(s2.toUpperCase());

The output of above code is:

phoenixland
ISLAND

Working

s1.substring(0) results in phoenix. s2.substring(2) results in land. concat method joins both of them resulting in phoenixland. s2.toUpperCase() converts island to uppercase.