Java will show several examples of "Unreachable code" errors

The reason for the compile error of "unreachable code" is that Java checks that the statements behind them cannot be executed unless

Because jumping to the next loop, or somewhere else, could not execute the next sentence because of a constant cycle of death. These errors are called compile-time errors

Checked exception: This type of exception is a subclass of exception

Unchecked exception: This type of exception is a subclass of RuntimeException

1. Throw keyword

Java code:

1  Public void throws throwable{  2     thrownew  throwable ();   3     SYSTEM.OUT.PRINTLN ("test");   4 }  

2. return keyword

Java code:

 Public void XXX () {      return;      System.out.println ("test");  }  

3. Continue keyword

Java code:

1  Public void XXX () {  2 for     (int i=0; i<10; i++) {  3         continue;   4         SYSTEM.OUT.PRINTLN ("test");   5     }  6 }  

4. break keyword

Java code:

 Public void XXX () {      for (int i=0; i<10; i++) {          if(i==5) {                 Break ;              System.out.println ("test");   }}}

5. while (true):

Java code:

 Public Static void XXX () {      while(true);      System.out.println ("when?");  

Java will show several examples of "Unreachable code" errors