Java (examples in classes and objects)

First, the parameter in the method is a numeric type (int)

ImportJava.util.Scanner; Public classScorecalc {Public   void calc (int num1,int num2,int  num3) {        intsum = num1 + num2 +num3; DoubleAVG = SUM/3; System.out.println ("Total:" +sum); System.out.println ("Average score:" +avg); }     Public Static voidMain (string[] args) {Scanner input=NewScanner (system.in); System.out.println ("Please enter the results of Java:"); intNUM1 =Input.nextint (); System.out.println ("Please enter C's score:"); intnum2 =Input.nextint (); System.out.println ("Please enter the score for DB:"); intNUM3 =Input.nextint (); Scorecalc Calc = new  Scorecalc (); Calc.calc (NUM1, num2, num3);         
Input.close (); }}

Operation diagram:

The parameter in the method is a string array (string[])

Import java.util.Arrays;  Public class Sortname {    public   string[] Sortname (string[] unorderarr){        Arrays.sort ( Unorderarr);         return Unorderarr;}    }

Importjava.util.Arrays;ImportJava.util.Scanner; Public classSortnametest { Public Static voidMain (string[] args) {String name[]=NewString[5]; Scanner Scanner=NewScanner (system.in); System.out.println ("Please enter the Participant list:");  for(inti = 0; I < 5; i++) {Name[i]=Scanner.next (); } sortname Sortname = new  sortname (); string[] Orderarr         = sortname.sortname (name);        System.out.println (arrays.tostring (Orderarr));    Scanner.close (); }}       

Operation diagram:

The parameters in the method are objects (Student Student)

 public  class   Student { double      Chinese;     double   math;     double   中文版;  public  Student (double  chinese,< Span style= "COLOR: #0000ff" >double  math,double   中文版)        { this . Chinese = Chinese;         this . Math = math;     this . 中文版 = 中文版; }}

 Public class Studentcalc {    publicdouble    Calc (Student Zhangsan){         Double avg = (Zhangsan.chinese + zhangsan.math + zhangsan.english)/3;         return avg;    }}

ImportJava.util.Scanner; Public classStudenttest { Public Static voidMain (string[] args) {Scanner Scanner=NewScanner (system.in); System.out.println ("Please input language score:"); DoubleChinese =scanner.nextdouble (); System.out.println ("Please enter Math score:"); DoubleMath =scanner.nextdouble (); System.out.println ("Please input English score:"); Double中文版 =scanner.nextdouble (); Student Zhangsan = new  Student (Chinese, math,english); Studentcalc scoreavg         = new  Studentcalc ();  double avg = Scoreavg.calc (Zhangsan); System.out.println ("The average score for each class is:" +avg);    Scanner.close (); }}

Operation diagram:

The parameter in the method is an array of objects (student[] s)

 public  class      Student {String name;     int   age;     double   height;  public  Student (String name,int  Age , double   height) { this . Name = name;         this . Age = age;     this . Height = height; }}

 Public class Studentmanager {    publicdouble    heightavg (student[] s){         double sum = 0;          for (int i = 0; i < s.length; i++) {            + = s[i].height        ;        } return sum/s.length;    }}

ImportJava.util.Scanner; Public classStudentmanagertest { Public Static voidMain (string[] args) {Scanner Scanner=NewScanner (system.in); Student students[]=NewStudent[2];  for(inti = 0; i < students.length; i++) {System.out.println ("Please enter the" + (i+1) + "Participant's name:"); String name=Scanner.next (); System.out.println ("Please enter the" + (i+1) + "age of each learner:"); intAge =Scanner.nextint (); System.out.println ("Please enter the" + (i+1) + "Height of the trainees:"); DoubleHeight =scanner.nextdouble (); Student Student=NewStudent (name,age,height); Students[i]=student; } Studentmanager Manager = new  Studentmanager ();  double avg = Manager.heightavg (students); System.out.println ("Average height:" +avg);    Scanner.close (); }}

Operation diagram:

Java (examples in classes and objects)