如何使用if（answer =='D'）？

System.out.println("Do you want to deposite or withdraw? (D/W)"); 
    String answer; 
    answer = input.nextLine(); 

    if("D" === answer)// Thing need to help 
    { 
    System.out.println("Enter deposite ammount: "); 
    depositeAmmount = input.nextDouble(); 
    System.out.printf("adding %.2f to account1\n\n", depositeAmmount); 
    acc1.Credit(depositeAmmount); 
    System.out.format("ballance of account1 is: %.2f\n", acc1.getBallance()); 
    System.out.format("ballance of account2 is: %.2f\n\n", acc2.getBallance()); 
    } 
    else if(){ 
    System.out.println("Enter withdraw ammount: "); 
    withdrawAmmount = input.nextDouble(); 
    System.out.printf("differing %.2f to account1\n\n", depositeAmmount); 
    acc1.Withdraw(withdrawAmmount); 

    System.out.format("ballance of account1 is: %.2f\n", acc1.getBallance()); 
    System.out.format("ballance of account2 is: %.2f\n", acc2.getBallance()); 
    } 
    else{ 
     System.out.println("The answer you input is invalid! Please input again!\n"); 
     answer = input.nextLine(); 
    }

正如你所看到的，我想使用if來創建提取和存款操作，如何將這個答案分配給字符D或W來執行此代碼。你可以向我展示怎麼做？非常感謝！如何使用if（answer =='D'）？

來源

2015-01-04 user3606668

使用'answer.equals（「d」）'或'回答。等於（「W」）來檢查相等性。 – 2015-01-04 10:42:10

查看[this]（http://stackoverflow.com/questions/4505357/what-is-the-difference-between-operator-and-equals-with-hashcode）==和等號的區別 – SMA 2015-01-04 10:42:57

您可以使用類似：

if(answer.equalsIgnoreCase("D")) { 
    // your code 
}

爲了彌補不同情況下的字母輸入d或d等

來源

2015-01-04 10:44:32 Aashir

如何使用if（answer =='D'）？

回答

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