Difference between System.exit(-1), System.exit(0) and System.exit(1) in java
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A) Difference between System.exit(-1), System.exit(0) and System.exit(1) methods in java.
System.exit(-1)>
  • If exit method returns -1 or some other negative number that means some error occurred,
  • The error occurred which user could NOT have expected.
  • Its Abnormal termination.
System.exit(0) >
  • If exit method returns 0 that means method execution was successful.
  • Its Normal termination.
System.exit(1) >
  • If exit method returns 1 or some other positive number that means some exception occurred,
  • The exception occurred which user could have expected.
  • These may be user defined codes to indicate the exception occurred which user could have expected.
  • Its Abnormal termination.
B) Let’s learn about System.exit(n) method in java >
  • System.exit terminates JVM.
  • Parameter
    • Passing zero as parameter means normal termination &
    • Passing non-zero as parameter means abnormal termination.
  • System.exit(n) internally calls Runtime.getRuntime().exit(n)
Also read Program to show what will happen when catch and finally both return some value. Click here.
SUMMARY >
Difference between System.exit(-1), System.exit(0) and System.exit(1) methods in java.
System.exit(-1)>
    • Abnormal termination. The error occurred which user could NOT have expected.
System.exit(0) >
  • Normal termination. Method execution was successful.
System.exit(1) >
  • Abnormal termination. The exception occurred which user could have expected.


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