Coding Practice--java-1-Basic __ajax

Welcome to visit the blog Basic Exercise Output

public class MyApp {public
    static void Main (string[] args) {
        System.out.println ("I can learn the Java language well.") ");
    }
}

Integer type

public class Test {public

    static void Main (string[] args) {
        byte mybyte = 124;
        Short myshort = 32564;
        int myint = 45784612;
        Long mylong = 46789451L;
        Long result = Mybyte+myshort+myint+mylong;
        SYSTEM.OUT.PRINTLN (The result of the addition of four types is: "+result");
    }

Floating-point type

public class Test {public

    static void Main (string[] args) {
        float f1 = 12.23f;
        Double D1 = 4562.12d;
        Double d2 = 45678.1564;
        Double result = F1+D1+D2;
        System.out.println ("Floating-point number addition achieves the result:" +result);

    }

Character type

public class Test {public

    static void Main (string[] args) {
        int i = ' d ';
        char C =;
        The Unicode code for the SYSTEM.OUT.PRINTLN ("character D" is: "+i);
        System.out.println ("the character represented by Unicode code 97 is:" +c);
    }

Escape character

public class Test {public

    static void Main (string[] args) {
        char char1 = ' \ ';
        Char char2 = ' \u2605 ';
        SYSTEM.OUT.PRINTLN ("Output back slash:" + char1);
        SYSTEM.OUT.PRINTLN ("Output pentagram:" + char2);
    }

variables (declarations and definitions)

public class Test {public

    static void Main (string[] args) {
        int i=;
        System.out.println ("I's initial value is:" +i);
        i=;
        System.out.println ("I now the value is:" +i);

    }

Declaring constants
Final General capitalization

public class Test {public
    static void Main (string[] args) {
        final double PI = 3.1415926F;//FINAL Capital
        final B Oolean BOOL = true;
    }
}

Variables and constants (static variables)

public class Test {
    static final double PI = 3.14;
    static int age =;
    public static void Main (string[] args) {
        final int number;
        Number = 1235;
        Age =;
        SYSTEM.OUT.PRINTLN ("Constant PI value is:" +pi);
        System.out.println ("The value of number after assignment is:" +number);
        System.out.println (the value of age of int variable is: + age);
    }

Member variables (static variables) and local variables

public class Test {The
    static int times = 3;
    public static void Main (string[] args) {
        int times = 4;
        System.out.println ("The value of the Times is:" + times);
        System.out.println ("The value of the Times is:" + test.times);
    }

Assignment operator

public class Test {public
    static void Main (string[] args) {
        int a,b,c;
        A =;
        c = b = a+4;
        System.out.println ("C's value is:" + C);
        System.out.println ("B's value is:" + b);
    }
}

Arithmetic operators

    public static void Main (string[] args) {
        float number1 = 45.56f;
        int number2 = 152;
        System.out.println ("45.56f and 152 's and for:" + (Number1+number2));
        System.out.println ("45.56f and 152 difference is:" + (Number1-number2));
        System.out.println ("45.56f and 152 product is:" + (Number1*number2));
        System.out.println ("45.56f and 152 of the merchants are:" + (Number1/number2));
    }

Relational operators

public class Test {public
    static void Main (string[] args) {
        int number1 = 4;
        int number2 = 5;
        System.out.println ("4>5 is established:" + (Number1>number2));
        System.out.println ("4<5 is established:" + (Number1<number2));
        System.out.println ("4==5 is established:" + (Number1==number2));
        System.out.println ("4!=5 is established:" + (Number1!=number2));
        System.out.println ("4>=5 is established:" + (Number1>=number2));
        System.out.println ("4<=5 is established:" + (Number1<=number2));
    }

logical operators

public class Test {public
    static void Main (string[] args) {
        int a = 2;
        int b = 5;
        Boolean RESULT1 = ((a>b) && (a!=b));
        Boolean result2 = ((a>b) | | (a!=b));
        The value of System.out.println ("(a>b) && (a!=b) is:" + result1);
        System.out.println ("(a>b) | | The value of (A!=B) is: "+ result2);
    }
}

Bitwise operator

public class Test {public
    static void Main (string[] args) {
        int i = +;
        int j =;
        char c = ' a ';
        System.out.println ("& 97 value is:" + (I&J));
        The value of System.out.println ("& ' A" is: "+ (I^c));
        System.out.println ("The  value of the >>1 is:" + (i>>1));
    }

Ternary conditional operator

public class Test {public
    static void Main (string[] args) {
        int i = +;
        int j =;
        int z = i>j? 100:200;
        System.out.println ("i>j?100:200 value is:" + z);
    }

Instance-implement two variable swaps without other variables

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 value of variable a: \ n");
        Long A = Scan.nextlong ();
        System.out.println ("Please enter the value of variable Wolf B: \ n");
        Long B = Scan.nextlong ();
        System.out.println ("a=" +a+ "\tb=" +b);
        SYSTEM.OUT.PRINTLN ("Execute variable Interchange ...");
        A = a^b;
        B = B^a;
        A = a^b;
        System.out.println ("a=" +a+ "\tb=" +b);
    }

Example-determining the parity of numbers

Import Java.util.Scanner;
public class Test {public
    static void Main (string[] args) {
        Scanner scan = new Scanner (system.in);
        System.out.println ("Please enter an integer:");
        Long number = Scan.nextlong ();
        String Check = (number%2 = 0)? "This number is: even": "This number is: odd";
        SYSTEM.OUT.PRINTLN (check);
    }

Automatic type conversion

public class Test {public
    static void Main (string[] args) {
        float number1 = 45f;
        int number2 = 152;
        System.out.println (Number1+number2);
    }

public class Test {public
    static void Main (string[] args) {
        byte mybyte = 127;
        int myint =;
        float myfloat = 452.12f;
        char MyChar = ten;
        Double mydouble = 45.46546;
        Output the result of the Operation
        System.out.println ("127 + 452.12 =" + (mybyte+myfloat));
        System.out.println ("127*150 =" + (mybyte*myint));
        System.out.println ("127/10 =" + (Mybyte/mychar));
        System.out.println ("45.46546+10 =" + (Mydouble+mychar));
    }

Force type conversions

public class Test {public
    static void Main (string[] args) {
        int a = (int) 45.23;
        Long y = (long) 456.6F;
        int b = (int) ' A ';
        System.out.println ("a =" + a);
        System.out.println ("y =" + y);
        System.out.println ("b =" + B);
    }
}

Instance-Type conversions

public class Test {public
    static void Main (string[] args) {
        int intnum = 4;
        float floatnum = 9.5F;

        Floatnum/= Intnum; Automatic type conversion
        System.out.println ("9.5F/4 =" + floatnum);

        Double numx = 4.88;
        Double numy = 78.83;
        int numz = (int) numx + (int) numy; Force type conversion
        System.out.println ("4.88 + 78.83 =" + numz);

        Char Charvar = ' T ';
        int intvar = (int) Charvar;
        System.out.println ("convert character t to int type variable is:" + Intvar);

        int num1 = n;
        Double num2 = (double) NUM1/3;
        System.out.println ("34 of One-third is:" +num2);
    }

Comments
Single line multiline document comment

public class Test {public
    static void Main (string[] args) {
        //single line comment/
         * Multiline Comment 1
         * Multiline Comment 2

        /* *
         * Document comment
         /
    }
}

Example-Determine whether a year is a leap years

Import Java.util.Scanner;
public class Test {public
    static void Main (string[] args) {
        Scanner scan = new Scanner (system.in);
        System.out.println ("Please enter a year:");
        Long year = Scan.nextlong ();
        if (year%4==0 && year%100!=0 | | year%400==0) {
            System.out.println (year +) is a leap years. ");
        } else {
            System.out.println is not a leap year. ");
        }
    }
}

Example-Spherical volume

Import Java.util.Scanner;
public class Test {public
    static void Main (string[] args) {
        Scanner scan = new Scanner (system.in);
        System.out.println ("Please enter a spherical radius:");
        Double r = scan.nextdouble ();
        Final double PI = 3.1415926;
        Double volume = 4.0/3.0*pi*r*r*r;
        System.out.println ("The radius of the sphere is:" + R);
        System.out.println ("PI is:" + pi);
        System.out.println ("Spherical volume is:" + volume);
    }

Compound statement

public class Test {public
    static void Main (string[] args) {
        int y =;
        System.out.println ("Output y value: + y");
        int z = 245;
        Boolean B;
        Compound statement
        {
            b = y>z;
            System.out.println ("Y>z City": "+ B";
        }}}