Java Learning (vi)

 Public classmatrixaddition{ Public Static voidMain (String args[]) {inti,j,k; intA[][] =New int[3] [4]; intB[][] = {{1,5,2,8},{5,9,10,-3},{2,7,-5,-18}}; intC[][] =New int[3] [4];  for(i = 0;i < 3;i++)             for(j = 0;j < 4;j++) A[i][j]= (i + 1) * (j + 2);  for(i = 0;i < a.length;i++)             for(j = 0;j < a[i].length;j++) C[i][j]=a[i][j]+B[i][j]; System.out.println ("*******matrix c********");  for(i = 0;i < c.length;i++){             for(j = 0;j < c[i].length;j++) System.out.print (C[i][j]+" "); System.out.print ("\ n"); }    }}
         

• Various uses of arrays

 Public classarraydemo{Static floatAveragearray (floata[]) {        floatAverage = 0; inti;  for(I =0;i < a.length;i++) {Average= Average +A[i]; }        returnaverage/a.length; }     Public Static voidMain (string[] args) {floatAverage,a[] = {1,2,3,4,5}; Average=Averagearray (a); System.out.println ("Average =" +average); }}

• Array as the parameter of the method.

• In the formal parameter list, the parentheses after the array name cannot be omitted, and the number of elements in the list cannot be given;

• When an array masterpiece is an argument, the address is passed, that is, the argument and the parameter have the same storage unit.

Java Learning (vi)