java - StringBuffer buffer = new StringBuffer() 行中无法访问的语句

Question

错误是:

Unreachable statement in line StringBuffer buffer = new StringBuffer()

这是我的代码:

    public void viewAll(){
    btnViewData.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Cursor res =myDB.getAllData();
            if (res.getCount() == 0)
                showMessage("Error","No data Found");
            {
                return;
            }

            StringBuffer buffer = new StringBuffer();

            while (res.moveToNext()){
                buffer.append("Id :"+res.getString(0)+"\n");
                buffer.append("Name :"+res.getString(1)+"\n");
                buffer.append("Surname :"+res.getString(2)+"\n");
                buffer.append("Marks :"+res.getString(3)+"\n\n");

            }
            showMessage("Data",buffer.toString());
        }
    });
}

Answer 1

更新您的代码。您在错误的位置使用了 {}，这就是您遇到此问题的原因。

if (res.getCount() == 0){
            //show message
            showMessage("Error","No data Found");
            return;
        }