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Lectur

e 4

Classes and

Objects

Re v i e w

Solutions 1

pub lic stati c int get Min Index int val ues ) {4 int mi nV a lue = In t ege r.M AX _ VAL UE ;4 int mi nI n dex = -1 for (in t i =0; i< va l ues .le ng t h i++ )4 if (va lu e s [i m i nVa lue min Val ue = v alu es i]; min Ind ex = i ret urn m i nIn dex

Solutions 2

public static int getSecondMinIndex( int[] values) { int secondIdx = -1; int minIdx= getMinIndex(values); for(int i=0; iSystem.out.println(values[ 0 // 99 V a lues 99
100
101
Inde x es 0 1 2 P o pular Issues 2

Curly br

aces a f t er if/ e lse f or/while for int i 0; i

5; i++)

System.out.println(

"Hi"

System.out.println("Bye");

Wha t does this prin t P o pular Issues 3 V ariable initializ a tion int getMinValue( int[] vals) { int min = 0; for (int i 0; i vals.length; i++) { if (vals[i] < min) { min = vals[i] Pr oblem? Wha t if vals = {1,2,3} Set min = Integer.MAX_VALUE or vals[0] P o pular Issues 4 V ariable Initializ a t ion sec ondMinInde x int minIdx = getMin(vals) int secondIdx = 0; for int i 0; i vals.length; i++) { if (i == minIdx) continue if (vals[i] < vals[secondIdx]) secondIdx = i; Wha t if v a ls = {0, 1, 2}?

See solutions

P o pular Issues 5 De fining a me thod inside a method public static void main(String[] arguments) { public static void foobar Debug ging Not es 1 Use S y s t em.out.prin t ln thr oughout y our c ode t o see wha t it s doing for int i=0; i< vals.length; i++) { if ( vals[i] < minVal) {

System.out.

println "cur min: " + minVal);

System.out.

println "new min: " + vals[i]); minVal = vals[i]; Debug ging Not es 2 F orma t t ing

Ctrl-shift-f

is y our friend for int i 0; i vals.length; i++) { if (vals[i] < vals[minIdx]) { minIdx=i;} return m inIdx;}

Is ther

e a bug?

Who know

s! Har d t o r ead T oda y s T opics

Object orien

t e d pr ogr amming De fining Classes

Using Classes

R e f e r e nces vs V a lues St a t ic types and methods T oda y s T opics

Object orien

t e d pr ogr amming De fining Classes

Using Classes

R e f e r e nces vs V a lues St a tquotesdbs_dbs17.pdfusesText_23