1.构造函数 import java.util.Scanner; public class Cjava { public static void main(String[]args) { Time t1=new Time(); t1.settime(); t1.showtime(); Time t2=new Time(); t2.showtime(); } } class Time{ int hour,minute,sec; Time(){ hour=0;minute=0;sec=0; } vo…
1.例5.4将二维数组的行列互换 public class cjava { public static void main(String []args) { int [][]a=new int [][] {{7,5,6},{3,6,9}}; int [][]b=new int [3][2]; int i,j; for(i=0;i<2;i++) { for(j=0;j<3;j++) { b[j][i]=a[i][j]; } } for(i=0;i<2;i++) { for(j=0;j<…