Question

System.out.printf("The sum is " + sum);

，错误是 PrintStream类型中的printf（String，Object []）方法不适用于参数（String，int）

System.out.printf("The sum of %d and %d  is %d . " ,a,b,sum);

工作但如果我需要打印

怎么办？

＆＃34; 5和6的总和是11＆＃34;

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但是在Eclipse Platform Version：3.8.1（Ubuntu）上得到了上述错误

Answer 1

如果System.out.printf给你这个错误：

 The method printf(String, Object[]) in the type PrintStream is not applicable for the arguments (String, int)

然后，您必须为正确的Java版本配置项目。

Java 5引入了带有变量参数的方法。

或者，您可以这样做：

System.out.printf("The Sum of %d and %d is %d\n", new Object[] {a, b, sum});

Answer 2

请针对您的错误查看此问题：Eclipse Java printf issue PrintStream is not applicable

或者，您可以使用.format

System.out.format("The sum of %d and %d  is %d . " ,1, 2, 3);

https://docs.oracle.com/javase/tutorial/java/data/numberformat.html

使用正确的Java版本集.printf也可以按预期工作

System.out.printf("The sum of %d and %d  is %d . " ,1, 2, 3);

Answer 3

 int a = 2;
 int b = 4;
 int c = a + b;
 System.out.format("The sum of %d  and  %d is %d ", a, b, c);

这是格式化输出中的简单方法

如何在java中打印变量的值

3 个答案: