Programming exercises in the 1th chapter of Java language programming

1.1

 Public class Test {    publicstaticvoid  main (string[] args) {        System.out.println ( "Welcome to Java");        System.out.println ("Welcome to Computer");        SYSTEM.OUT.PRINTLN ("Programming is Fun");}    }

1.2

 Public class Test {    publicstaticvoid  main (string[] args) {        for ( int i = 0; I < 5; i++) {            System.out.println ("Welcome to Java");     }}}

1.3

 Public class Test {    publicstaticvoid  main (string[] args) {        System.out.println ( "   J    a    v     v    a");        System.out.println ("   J   a a    v   v    a");        System.out.println ("J  J  AAAAA    v v    AAAAA");        System.out.println ("JJ  a     a    V    a     ");    }}

1.4

 Public class Test {    publicstaticvoid  main (string[] args) {        System.out.println ( "A     a^2   a^3");        System.out.println ("1     1     1");        System.out.println ("2     4     8");        System.out.println ("3     9     ");        System.out.println ("4    ");}    }

1.5

 Public class Test {    publicstaticvoid  main (string[] args) {        double s = (9.5*4.5-2.5*3)/(45.5-3.5);        System.out.println (s);   // 0.8392857142857143     }}

1.6

 Public class Test {    publicstaticvoid  main (string[] args) {        int s=0 ;          for (int i=0; i<10; + +i) {            s+ =i;        }        System.out.println (s);   //  $     }}

1.7

 Public classTest { Public Static voidMain (string[] args) {DoublePI = 0; DoubleT; intM=1;  for(intI=1; i<12121358; i++) {T=1.0/(2*i-1); T*=m; Pi+=T; M*=-1; } Pi*=4; System.out.println (PI); //3.1415927360890374    }}

Programming exercises in the 1th chapter of Java language programming