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Name

catch

Examples
BufferedReader reader;
String line;
 
void setup() {
  // Open the file from the createWriter() example
  reader = createReader("positions.txt");    
}
 
void draw() {
  try {
    line = reader.readLine();
  } catch (IOException e) {
    e.printStackTrace();
    line = null;
  }
  if (line == null) {
    // Stop reading because of an error or file is empty
    noLoop();  
  } else {
    String[] pieces = split(line, TAB);
    int x = int(pieces[0]);
    int y = int(pieces[1]);
    point(x, y);
  }
}
Description The catch keyword is used with try to handle exceptions. Sun's Java documentation defines an exception as "an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions." This could be, for example, an error while a file is read.
Syntax
try {
  tryStatements
} catch (exception) {
  catchStatements
} 
Parameters
tryStatements if this code throws an exception, then the code in "catch" is run
exception the Java exception that was thrown
catchStatements code that handles the exception
Updated on August 17, 2018 03:36:37pm EDT

Creative Commons License