java how to make a parameter optional
void foo(String a, Optional<Integer> bOpt) { Integer b = bOpt.isPresent() ? bOpt.get() : 0; //... } foo("a", Optional.of(2)); foo("a", Optional.<Integer>absent());
Source: stackoverflow.com
java how to make a parameter optional
void foo(String a, Integer... b) { Integer b1 = b.length > 0 ? b[0] : 0; Integer b2 = b.length > 1 ? b[1] : 0; //... } foo("a"); foo("a", 1, 2);
Source: stackoverflow.com
java optional parameters
void foo(String a, Object... b) { Integer b1 = 0; String b2 = ""; if (b.length > 0) { if (!(b[0] instanceof Integer)) { throw new IllegalArgumentException("..."); } b1 = (Integer)b[0]; } if (b.length > 1) { if (!(b[1] instanceof String)) { throw new IllegalArgumentException("..."); } b2 = (String)b[1]; //... } //... } foo("a"); foo("a", 1); foo("a", 1, "b2");
Source: stackoverflow.com