1. traversing the array: according to certain rules, in order to access elements in an array
int test[]={1,2,3,4,5};
for(int a1=0;a1<test.length;a1++){
System.out.print(test[a1]+"\n");
}Array dedicated loop: for-each;
for (variable name Type: Array) {
// statement
}
optimization
int test[]={1,2,3,4,5};
for(int t1:test){
System.out.print(t1);
}
2. seeking an array of maximum and minimum
int min,max;
int a[]={100,109,88,19};
min=max=a[0];
for(int i=0;i<a.length;i++){
if(a[i]>max){ //判断是否最大
max=a[i];
}
if(a[i]<min){
min=a[i];
}
}
System.out.print("max:"+max+"\n");
System.out.print("min:"+min);
3. Sort the array
3.1 Arrays.sort () method to sort elements in the array:
int a[]={100,109,88,19};
for(int i=0;i<a.length;i++){
Arrays.sort(a);
}
System.out.print("=========="+"\n");
for(int j=0;j<a.length;j++){
System.out.print(a[j]+"\n");
}
4. Find the elements of the specified array
int a[]={100,109,88,19};
int n=88;
for(int i=0;i<a.length;i++){
if(a[i]==n){
System.out.print("=========="+"\n"+(i+1));
}
}