無法在民調顯示正確的百分比值

-1

int votedTotal_int = pollObject.getList("votedBy").size(); 
System.out.println("Total votes cast: " + Integer.toString(votedTotal_int)); 

int value1_int = pollObject.getList("value1Array").size(); 
double value1_pct = ((value1_int/votedTotal_int) * 100); 
String value1_string = String.valueOf(value1_pct); 
holder.value1.setText(value1_string + " %"); 
System.out.println(holder.value1.getText().toString() + " votes");

鑑於value1_int爲1，votedTotal_int是4，應該不是打印出閱讀25.0％？那麼，爲什麼我會得到以下？

07-24 16:48:21.626 13321-13321/com.test.android I/System.out: Total votes cast: 4 
07-24 16:48:21.626 13321-13321/com.test.android I/System.out: 0.0 % votes 
07-24 16:48:21.626 13321-13321/com.test.android I/System.out: 0.0 % votes 
07-24 16:48:21.626 13321-13321/com.test.android I/System.out: 0.0 % votes 
07-24 16:48:21.626 13321-13321/com.test.android I/System.out: 0.0 % votes

來源

2017-07-24 santafebound

除兩個整數將使用整數除法（即3/4 == 0）。人們可以做'value1_int * 100.0/votedTotal_int'等。 –

看到[Integer師]（http://stackoverflow.com/questions/4685450/why-is-the-result-of-1-3-0） –

-1

更改下面..

double value1_pct = ((value1_int/votedTotal_int) * 100);

到

double value = (((double)value1_int * 100)/((double)votedTotal_int));

樣品試驗與value1_int=1和votedTotal_int=1000 or 10000 or 100000

07-24 17:09:13.904 3491-3491/? D/TEST: 0.1 
07-24 17:09:30.688 3589-3589/? D/TEST: 0.01 
07-24 17:09:45.366 3685-3685/? D/TEST: 0.001

來源

2017-07-24 23:57:16 JRG

嘗試你的代碼與這些值'int value1_int = 1; \t \t int votedTotal_int = 1000;' –

這不應該是被接受的答案 - 這是錯誤的 –

爲什麼？它工作得很好。 – santafebound

double value1_pct = (((double)value1_int * 100)/(double)votedTotal_int);

來源

2017-07-24 23:58:49

無法在民調顯示正確的百分比值

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