Was wird hier ausgegeben? Also was ist der Inhalt der erg Variable?<\/p>\n
int a = 5;
\nint b = 10;<\/p>\n
double erg = a \/ b;<\/p>\n
System.out.println(erg);<\/p>\n
a) 0.5
\nb) 0.0
\nc) null
\nd) java.lang.ArithmeticException
\n<\/p>\n
Das Ergebnis b) 0.0 richtig.<\/p>\n
Es wurde eine division von zwei int durchgef\u00fchrt.
\nEs wurde in das Ergebnis erg nur der Ganzzahlige (integraler) Anteil also 0 zugewiesen.<\/p>\n
Das war sicher nicht das erwartete Ergebnis, oder? Was kann man tun?<\/p>\n
Z.b. einen cast vor der division von einem oder beiden Operatoren:<\/p>\n
double richtig = a \/ (double) b;
\nSystem.out.println(richtig); \/\/ = 0.5<\/p>\n
Was in diesem Zusammenhang oft vergessen wird, ist das testen des divisors (b) auf 0 bei ganzzahliger division.
\nIst der 0, kommt es n\u00e4mlich zu einer ArithmeticException.
\nZ.b.:<\/p>\n
double ex = a \/ 0; \/\/ Exception in thread „main“ java.lang.ArithmeticException: \/ by zero<\/p>\n","protected":false},"excerpt":{"rendered":"
Was wird hier ausgegeben? Also was ist der Inhalt der erg Variable? int a = 5; int b = 10; double erg = a \/ b; System.out.println(erg); a) 0.5 b) 0.0 c) null d) java.lang.ArithmeticException<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,5],"tags":[104,202,138,2178,201],"class_list":["post-338","post","type-post","status-publish","format-standard","hentry","category-allgemein","category-java","tag-abends","tag-basics","tag-int","tag-java","tag-umwandlung"],"_links":{"self":[{"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/posts\/338","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=338"}],"version-history":[{"count":0,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/posts\/338\/revisions"}],"wp:attachment":[{"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=338"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}