数组的默认值

 public class Test {
     static int is[] = new int[5];  
     static String[] arrs = new String[5];  
     static Object[] objs = new Object[5];
     static Boolean[] bo = new Boolean[5];
  
     public static void main(String[] args) {  
         int n = 1;  
         for (int i : is) {  
             System.out.print("is[" + n + "] = " + i + "; ");  
             n++;  
         }  
         System.out.println();  
         n -= 5;// n=n-5;  
         for (String arr : arrs) {  
             System.out.print("arrs[" + n + "] = " + arr + "; ");  
             n++;  
         }  
         System.out.println();  
         n -= 5;// n=n-5;  
         for (Object obj : objs) {  
  
             System.out.print("objs[" + n + "] = " + obj + "; ");  
             n++;  
         }
         System.out.println();  
         n -= 5;// n=n-5; 
         for(Boolean boo :bo){
             System.out.print("bo[" + n + "] = " + boo + "; ");  
             n++;
         }
  
     }  
 }

 

====Result结果:

is[1] = 0; is[2] = 0; is[3] = 0; is[4] = 0; is[5] = 0;
arrs[1] = null; arrs[2] = null; arrs[3] = null; arrs[4] = null; arrs[5] = null;
objs[1] = null; objs[2] = null; objs[3] = null; objs[4] = null; objs[5] = null;
bo[1] = null; bo[2] = null; bo[3] = null; bo[4] = null; bo[5] = null;