80,351
社区成员
发帖
与我相关
我的任务
分享
public class MainActivity extends Activity implements OnClickListener {
EditText editText;
Button bt;
TextView textView,textView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText=(EditText)findViewById(R.id.edittext);
bt=(Button)findViewById(R.id.button);
textView=(TextView)findViewById(R.id.tv1);
textView1=(TextView)findViewById(R.id.tv2);
bt.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
String str=editText.getText().toString();
textView.setText(str+"以内的质数有:");
textView1.setText("2,3");
try{
int n=Integer.parseInt(str);
int i=5;
int j;
while(i<=n)
{
j=2;
while(j<i)
{
if(i%j==0)
break;
if(i-1==j)
textView1.append(","+i);
j++;
}
i++;
}
}
catch (Exception e)
{
textView1.setText(e.toString());
}
break;
default:break;
}
}
}