changed methods to bool and simplified if statements in methods
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@ -23,34 +23,32 @@ public class Zahlenfilter {
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public void checkNumbers(int grenze) {
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for (int i = 1; i <= grenze; i++) {
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checkDevideByFive(i);
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checkEndsWithNine(i);
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checkSumWithPrev(i);
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if (filter(i)){
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System.out.println(i);
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}
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}
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}
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public boolean filter(int i){
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return !(checkDivideByFive(i) || checkEndsWithNine(i) || checkSumWithPrev(i)) ;
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}
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private void checkDevideByFive(int zahl) {
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if (zahl % 5 == 0) {
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System.out.println(zahl + " ist durch 5 teilbar!");
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}
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private Boolean checkDivideByFive(int i) {
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return i % 5 == 0;
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}
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private void checkEndsWithNine(int zahl) {
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if (zahl % 10 == 9) {
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System.out.println(zahl + " endet auf 9!");
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}
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private Boolean checkEndsWithNine(int i) {
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return i % 10 == 9;
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}
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private void checkSumWithPrev(int zahl) {
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if (zahl > 1) {
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int vorgaenger = zahl - 1;
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int summe = zahl + vorgaenger;
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if (summe % 3 == 0) {
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System.out.println(zahl + " und " + vorgaenger + " addiert ergeben " + summe + " und " + summe + " ist durch 3 teilbar.");
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}
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private Boolean checkSumWithPrev(int i) {
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if (i > 1) {
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int vorgaenger = i - 1;
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int summe = i + vorgaenger;
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return summe % 3 == 0;
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}
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return false;
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}
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}
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