String[] array = {1,2,3,4,5,6,7,8,10,20}; Set set = new HashSet(); for(int i = 0; i < array.length; i++) { set.add(array.length); }
int a[] = {1,2,3,4,5,6,7,8,10,20} int b[] = {0,2,5,8,20} Map m = new HashMap(); for(int i = 0 ; i < a.length; i++) { if(m.get(a[i])==null) m.put(a[i],1); else m.put(a[i],m.get(a[i])+1); }大致是这意思,数值作为Key,次数作为value 最后遍历如果次数大于1的就不要了
String[] array = {1,2,3,4,5,6,7,8,10,20};
Set set = new HashSet();
for(int i = 0; i < array.length; i++) {
set.add(array.length);
}
int b[] = {0,2,5,8,20}
Map m = new HashMap();
for(int i = 0 ; i < a.length; i++)
{
if(m.get(a[i])==null)
m.put(a[i],1);
else
m.put(a[i],m.get(a[i])+1);
}大致是这意思,数值作为Key,次数作为value
最后遍历如果次数大于1的就不要了
int[] b=new int []{2,3,4};
for(int ai=0,bi=0,al=a.length,bl=b.length;ai<al;){
if(bi==bl||a[ai]<b[bi]){
System.out.print(a[ai]+",");
ai++;
}else if(a[ai]==b[bi]){
ai++;
bi++;
}else{
bi++;
}
}