No.
class Hello { public static void main ( String[] args ) { System.out.println("Hello Earwig!"); } }
Just because a program compiles and runs does not mean that it is correct. For example, say that your assignment is to create a program that writes "Hello World!" on the computer monitor. But you write the above program.
When a program compiles without any syntax errors, but does not perform as expected when it runs, the program is said to have a bug.