Final answer:
In a Java program, a decision is made using a conditional statement, such as if, else, or switch, to execute code blocks based on specific conditions.
Step-by-step explanation:
A decision can be made in a Java program using a conditional statement. Conditional statements in Java, such as if, else, and switch, allow the program to execute different blocks of code based on certain conditions being met.
For example, the if statement allows the program to test the condition, and executes the subsequent code block only if the condition is true.
Alternatively, an else clause can be used to execute a different block of code if the condition is false. Conditional statements are fundamental to decision-making in programming, enabling dynamic and responsive behavior within the code.