Java Basic Knowledge Enhancement Collection Framework Note 36:list keyboard input multiple data in the console output maximum value

1. Keyboard input multiple data, end with 0, require the console output of the maximum value in this multiple data

Analysis:
　　• Create keyboard Entry data Objects
• 　　 keyboard Input Multiple data, we do not know how many, so with a collection of storage
• 　　 End With 0, this simple, as long as the keyboard input data is 0, I will not continue to enter data
　　• turn the collection into a group
　　• sorting an array
• 　　 Gets the value of the largest index in the array

2. Code implementation:

11. Packagecn.itcast_03;2 3 Importjava.util.ArrayList;4 Importjava.util.Arrays;5 ImportJava.util.Scanner;6 7 /*8 * Keyboard input multiple data, end with 0, require the console output of the maximum value in this multiple data9  * Ten * Analysis: One * A: Create A Keyboard Entry data Object A * B: Keyboard input Multiple data, we do not know how many, so with a collection of storage - * C: End with 0, this simple, as long as the keyboard input data is 0, I will not continue to enter data - * D: Turn the set into a group the * E: Sorting an array - * F: Gets the value of the largest index in the array -  */ -  Public classArraylistdemo { +      Public Static voidMain (string[] args) { -         //Creating a Keyboard entry data object +Scanner sc =NewScanner (system.in); A  at         //keyboard input Multiple data, we do not know how many, so with a collection of storage -arraylist<integer> array =NewArraylist<integer>(); -  -         //End With 0, this simple, as long as the keyboard input data is 0, I will not continue to enter data -          while(true) { -System.out.println ("Please enter data:"); in             intNumber =sc.nextint (); -             if(Number! = 0) { to Array.add (number); +}Else { -                  Break; the             } *         } $ Panax Notoginseng         //Turn a collection into an array -         //Public <T> t[] ToArray (t[] a) theinteger[] I =Newinteger[array.size ()]; +         //integer[] II = Array.toarray (i); A Array.toarray (i); the         //System.out.println (i); +         //System.out.println (ii); -  $         //sort an array $         //Public static void sort (object[] a) - Arrays.sort (i); -  the         //gets the value of the largest index in the array -SYSTEM.OUT.PRINTLN ("Array is:" + arraytostring (i) + "maximum value is:"Wuyi+ i[i.length-1]); the     } -  Wu      Public StaticString arraytostring (integer[] i) { -StringBuilder SB =NewStringBuilder (); About  $Sb.append ("["); -          for(intx = 0; x < i.length; X + +) { -             if(x = = I.length-1) { - sb.append (i[x]); A}Else { +Sb.append (I[x]). Append (","); the             } -         } $Sb.append ("]"); the  the         returnsb.tostring (); the     } the}

Run the results as follows:

Java Basic Knowledge Enhancement Collection Framework Note 36:list keyboard input multiple data in the console output maximum value