In Java, variables are explicitly declared and used by the compiler to e.g. check type-correctness of function calls.
class Variables {
public static void main(String[] args) {
//You can declares 1 or more variables.
String a = "initial";
System.out.println(a);
// You can declare multiple variables at once.
Integer b = 1, c = 2;
System.out.println(b + " " + c);
//'var' will infer the type of initialized variables.
var d = true;
System.out.println(d);
// Variables declared without a corresponding initialization are not able to be called, calling will be resulting in error.
// Integer e;
// System.out.println(e);
}
}
javac Variables.java
java Variables
# initial
# 1 2
# true
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