swing - How to clear text fields using for loop in java -

i created text fields in java following. when click "clear" button want clear of these text fields @ once.

private javax.swing.jtextfield num1; private javax.swing.jtextfield num2; private javax.swing.jtextfield num3; private javax.swing.jtextfield num4; private javax.swing.jtextfield num5; private javax.swing.jtextfield num6; private javax.swing.jtextfield num7; 

now want know how use loop clear these text fields like:

for(int i=1;1<7;i++){    num[i].settext(null); } 

code this:

private javax.swing.jtextfield num1; private javax.swing.jtextfield num2; private javax.swing.jtextfield num3; private javax.swing.jtextfield num4; private javax.swing.jtextfield num5; private javax.swing.jtextfield num6; private javax.swing.jtextfield num7; 

is code crying out arranged , simplified using collections or arrays. if use array of jtextfield or perhaps better arraylist<jtextfield>. clearing them trivial.

public static final int field_list_count = 7;  private list<jtextfield> fieldlist = new arraylist<jtextfield>();  // in constructor (int = 0; < field_list_count; i++) {   jtextfield field = new jtextfield();   fieldlist.add(field);   fieldholderjpanel.add(field); // jpanel holds text fields }  // clear method public void clearfields() {   (jtextfield field : fieldlist) {     field.settext("");   } }