Code Practice--java-2-Process Control __ajax

Welcome to visit the blog conditional Conditional statement-if

public class Test {public
    static void Main (string[] args) {
        int a =;
        if (a==100) {
            System.out.println ("A is a value");}
        }

public class Test {public
    static void Main (string[] args) {
        int x =;
        int y =;
        if (x>y) {
            System.out.println ("variable x is greater than variable y");
        }
        if (x<y) {
            System.out.println ("variable x is less than variable Y");}}

public class Test {public
    static void Main (string[] args) {
        int math =;
        if (math>60) {
            System.out.println ("mathematically passed");
        } else {
            System.out.println ("Math failed");
}}

public class Test {public
    static void Main (string[] args) {
        int x =;
        if (x>30) {
            System.out.println ("A value greater than");
        } else if (x>10) {
            System.out.println ("A has a value greater than 10 but less than");
        } else if (x>0) {
            System.out.println ("A's value is greater than 0 but less than");
        } else {
            System.out.println ("A's value is less than 0");
    }
}

Conditional Statement-Switch

public class Test {public
    static void Main (string[] args) {
        System.out.println ("Today is the day of the Week:");
        Int week = 2;
        Switch (week) {case
        1:
            System.out.println ("Monday");
            break;
        Case 2:
            System.out.println ("Tuesday");
            break;
        Case 3:
            System.out.println ("Wednesday");
            break;
        Default:
            System.out.println ("Sorry, I don ' t Know");}}

Instance-Verifying the legality of login information

Import Java.util.Scanner;
public class Test {public
    static void Main (string[] args) {
        Scanner scan = new Scanner (system.in);
        System.out.println ("Please enter login username:");
        String username = scan.nextline ();
        System.out.println ("Please enter login password:");
        String password = scan.nextline ();

        if (!username.equals ("Mr")) {
            System.out.println ("User name is illegal");
        } else if (!password.equals ("Mrsoft")) {
            SYSTEM.OUT.PRINTLN ("Login password error");
        } else {
            System.out.println ("Congratulations, login information through Validation");}
        }

Example-Assigning a department to a new employee

Import Java.util.Scanner;
public class Test {public
    static void Main (string[] args) {
        Scanner scan = new Scanner (system.in);
        System.out.println ("Please enter the name of the new employee:");
        String name = Scan.nextline ();
        System.out.println ("Please enter the programming language for the new employee:");
        String language = Scan.nextline ();

        Switch (Language.hashcode ()) {case
        3254818: Case
        2301506: Case
        2269730:
            System.out.println ("employee" + Name + is assigned to the Java Program Development Department. ");
            break;
        Case 3104: Case
        2112:
            System.out.println ("employee" + name +) is assigned to the C # Project maintenance group. ");
            break;
        case-709190099: Case
        955463181: Case
        9745901:
            System.out.println ("Employee +name+" is assigned to the ASP.NET Program Test Department.) ");
            break;
        Default:
            System.out.println ("the company does not need" + language + "language Program developers.) ");
        }

    }
}

LoopsLoop Statement-While

public class Test {public
    static void Main (string[] args) {
        int x = 1;
        int sum = 0;
        while (x<=10) {
            sum = sum+x;
            x + +;
        }
        System.out.println ("from 1 to 10 and is:" + sum);

    }

Loop Statement-Do...while
Loop body, execute at least once.

public class Test {public
    static void Main (string[] args) {
        int a =;
        while (a==60) {//once System.out.println not executed
            ("ok! A==60 ");
            a--;
        }

        int b = m;
        do {    //execute at least once
            System.out.println ("ok! B==60 ");
            b--;
        }
        while (b==60);

    }
}

Loop Statement-For

public class Test {public
    static void Main (string[] args) {
        int sum = 0;
        for (int i=1; i<=100; i+=1) {
            sum = sum+i;
        }
        System.out.println (the sum of the numbers between 1 and 100 is: "+ sums";
    }
}

Loop Statement-foreach

public class Test {public
    static void Main (string[] args) {
        int arr[] = {7, 1};
        System.out.println ("Elements in one-dimensional array are:");
        for (int x:arr) {
            System.out.print (x+ "\ t");}}

Instance-traversing an array using a while loop

public class Test {public
    static void Main (string[] args) {
        string[] aves = new string[] {"Lu", "Red-crowned Crane", "Oriole", "Wu Raven "," Magpie "," cuckoo "," Gray-Bird "," Lark "};
        int index = 0;
        SYSTEM.OUT.PRINTLN ("There are many birds in my garden, species are:");
        while (Index < aves.length) {
            System.out.print (aves[index++] + "   ");
        }
    }

Instance-Output 99 multiplication table using for loop

public class Test {public
    static void Main (string[] args) {for
        (int i=1, i<=9; i++) {for
            (int j=1; j< =i; J + +) {
                System.out.print (j + "*" + i + "=" + (i*j) + "T");
            }
            System.out.println ();}}

Jump Statement-Break

public class Test {public
    static void Main (string[] args) {
        int sum = 0;
        String flag = "Number of consecutive integers from 1 to 100 is:";
        for (int i=1; i<=100; i++) {
            sum +=i;
            if (sum>1000) {
                flag = "from 1 to" + i + "The number of consecutive integers is:";
                Jump out of the layer loop break
                ;
            }
        SYSTEM.OUT.PRINTLN (flag + sum);

    }

Jump Statement-Continue

public class Test {public
    static void Main (string[] args) {
        int i = 0;
        System.out.println ("Odd number within 10:");
        while (i<10) {
            i++;
            if (i%2 = = 0) {
                continue
            }
            System.out.print (i + "  ");}}

Jump Statement-Return

Instance-end loop body (break)

public class Test {public static void main (string[] args) {System.out.println ("\n--
        --an example of interrupting a single-layer cycle----");
        string[] array = new string[] {"Lu", "Red-crowned Crane", "Oriole", "Parrot", "Crow", "Magpie", "Eagle", "cuckoo", "Eagle", "gray-Bird", "Eagle", "Lark"};
            for (String String:array) {if (String.equalsignorecase ("Eagle")) break;
        System.out.print ("Have:" + string + "");
        System.out.println ("\ n \----Example of a single 2-layer loop----");
        int[][] Myscores = new int[][] {{67,78,63,22,66}, {55,68,78,95,44},{95,97,92,93,81}};
        System.out.println ("Baby this test score: \ n math \ t Chinese T-English T-art T-history");
                No1:for (int[] is:myscores) {for (int i:is) {System.out.print (i + "t"); if (i<60) {System.out.println (\ n et cetera, "+ i +" is divided into what.) Why didn't you pass the exam?
                    ");
                Break No1;
        } System.out.println (); }

    }
}

Example-loop body filter (Continue)

public class Test {public
    static void Main (string[] args) {
        string[] array = new string[] {"Lu", "Red-crowned Crane", "Oriole", "Parrot", " Crows, "Magpie", "Eagle", "cuckoo", "Eagle", "Gray Bird", "Eagle", "Lark"};
        SYSTEM.OUT.PRINTLN ("There are many birds in my garden, but recently a few eagles, please help me take them away.") ");
        int eaglecount = 0;
        for (String string:array) {
            if (string.equals ("Eagle")) {
                System.out.println ("An eagle has been caught in a cage.") ");
                eaglecount++;
                Continue;
            }
            System.out.println ("Search for birds, found:" + string);
        }
        System.out.println ("Caught" altogether: "+ Eaglecount +" only eagle. ");
    }
}

Instance-output a hollow diamond using a for loop

public class Test {public static void main (string[] args) {Printhollowrhombus (10);
        public static void Printhollowrhombus (int size) {if (size%2==0) size++;
            for (int i=0; i<size/2+1; i++) {for (int j=size/2; j>i+1; j--) {System.out.print (""); for (int j=0; j<2*i+1; J + +) {if (j==0 | | j==2*i) System.
                Out.print ("*");
            else System.out.print ("");
        } System.out.println (""); for (int i=size/2+1; i<size; i++) {for (int j=0; j<i-size/2; J + +) {System.out.
            Print (""); for (int j=0; j<2*size-1-2*i; J + +) {if (j==0 | | j==2* (SIZE-I-1)) Syste
                M.out.print ("*");
            else System.out.print ("");
        } System.out.println ("");}
    }
} 

Instance-use for loop output Yang Hui's triangle

public class Test {public
    static void Main (string[] args) {
        int triangle[][] = new int[8][];
        for (int i=0; i<triangle.length; i++) {
            Triangle[i] = new int[i+1];
            for (int j=0; j<=triangle[i].length-1; J + +) {
                if i==0| | j==0| | j==triangle[i].length-1)
                    Triangle[i][j] = 1;
                else
                    triangle[i][j] = Triangle[i-1][j] + triangle[i-1][j-1];
                System.out.print (Triangle[i][j] + "T");
            }
            System.out.println ();}}