Java by Example: Variables
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In Java, variables are explicitly declared with specific data types. |
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public class Main |
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public static void main(String[] args){ |
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Variables in Java must be declared before use, with their data type specified. |
String a = "initial";
System.out.println(a);
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You can declare multiple variables of the same type at once. |
int b, c;
b = 1;
c = 2;
System.out.println(b + " " + c);
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Java requires explicit type declaration for all variables. |
boolean d = true;
System.out.println(d);
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Variables declared without a corresponding initialization are zero-valued or null-valued depending on their types. |
int e;
System.out.println(e);
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In Java, there is no shorthand for declaring and initializing a variable. Each step must be done explicitly. |
String f;
f = "apple";
System.out.println(f);
}
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Output: initial 1 2 true 0 apple |
Next example: Constants.