A simple Java program

1. Two-point lookup, Java input and output

1  Packagecom;2 3 4  Public classfirstapp{5      Public Static voidMain (String args[])6     {7Java.util.Scanner sc=NewJava.util.Scanner (system.in);8         intN,start,end,middle;9System.out.println ("Please Enter:");Tenn=sc.nextint (); One         inta[]={-2,1,4,5,8,12,17,23,45,56,90,100}; AStart=0; -End=a.length-1; -Middle= (start+end)/2; the         intCount=0; -          while(n!=A[middle]) { -             if(n>A[middle]) { -start=Middle; +             } -             Else if(n<A[middle]) { +End=Middle; A             } atMiddle= (start+end)/2; -count++; -                 if(COUNT&GT;A.LENGTH/2)     -                      Break; -             } -         if(COUNT&GT;A.LENGTH/2) inSystem.out.println (":" +n+ "not in array"); -         Else toSystem.out.println (":" +n+ "is an array of" +middle+ "elements"); +          -         } the}

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Class and object of 2.java, new initializes the object

1  Packagecom;2 classXiyourenwu {floatHeight,weight;3 String Head, Ear,hand,foot,mouth;4 voidspeak (String s)5 { 6Head= "Crooked Head";7 System.out.println (s);8 }9 }Ten  One  Public classExmple { A      Public Static voidMain (String args[]) - {Xiyourenwu zhubajie,sunwukong; -Zhubajie=NewXiyourenwu (); thesunwukong=NewXiyourenwu (); -zhubajie.height=1.80f;//object assigns a value to its own variable.  -zhubajie.weight=160f;  -Zhubajie.hand= "Two black Hands"; +zhubajie.foot= "Two Feet";  -Zhubajie.head= "Big Head";  +Zhubajie.ear= "A pair of big ears";  AZhubajie.mouth= "a big Mouth";  atsunwukong.height=1.62f;//object assigns a value to its own variable.  -sunwukong.weight=1000f;  -sunwukong.hand= "Small Hands"; -sunwukong.foot= "Two Embroidered feet";  -Sunwukong.head= "embroidered floating serves floating";  -Sunwukong.ear= "A pair of little ears";  inSunwukong.mouth= "Cherry Small Mouth"; -System.out.println ("Zhubajie Height:" +zhubajie.height); toSystem.out.println ("Zhubajie's head:" +zhubajie.head); +System.out.println ("Sunwukong Weight:" +sunwukong.weight); -System.out.println ("Sunwukong's head:" +sunwukong.head); theZhubajie.speak ("My old pig I want to marry a daughter-in-law");//object to invoke the method.  *System.out.println ("Zhubajie now head:" +zhubajie.head); $Sunwukong.speak ("Lao sun I weigh 1000 pounds, I want to cheat eight to recite Me");//object to invoke the method. Panax NotoginsengSystem.out.println ("Sunwukong now head:" +sunwukong.head); -  the     } +  A}

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A simple Java program