What keyword is used in Java to specify a block of code to be executed if a condition is true?

The keyword used in Java to specify a block of code to be executed if a condition is true is "if". Here is a step by step explanation:

1. First, you write the keyword "if" to start the conditional statement.
2. After "if", you put the condition in parentheses. The condition is a statement that can either be true or false.
3. If the condition is true, the block of code inside the curly braces {} following the condition will be executed.
4. If the condition is false, the block of code will be skipped.

Here is an example:

if (condition) {
  // block of code to be executed if the condition is true
}

In this example, "condition" is a placeholder for your actual condition.