关于android：如何使用Float数据类型调用setText()？

How to call setText() using a Float data type?

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public void onClick(View v) {
switch(v.getId()){
case R.id.save2:
s = text.getText().toString();
number = Float.parseFloat(num.getText().toString());
SharedPreferences.Editor editor = shared.edit();
editor.putString("sharedtext",s);
editor.putFloat("sharednum",number);
editor.commit();
Toast.makeText(this,"save2",Toast.LENGTH_SHORT).show();
break;
case R.id.load2:
String returner = shared.getString("sharedtext","Returner fail");
float returnnum = shared.getFloat("sharednum",0);
text.setText(returner);
num.setText(returnnum); //error here
Toast.makeText(this,"load2",Toast.LENGTH_SHORT).show();
break;
case R.id.page2:
intent= new Intent(this,SharedPreferencesActivity.class);
startActivity(intent);
Toast.makeText(this,"page2",Toast.LENGTH_SHORT).show();
break;
}

我该如何解决这个错误？

如何使像setInt(int num);

顺便说一句，变量num和text都是EditText