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View Compilation Error

0_0_22132944_21860\Main.java:20: 错误: 无法从静态上下文中引用非静态 变量 str
                    str[i]=sc.readLine();
                    ^
0_0_22132944_21860\Main.java:22: 错误: 无法从静态上下文中引用非静态 变量 str
                    if(str[i].length()>maxn)
                       ^
0_0_22132944_21860\Main.java:24: 错误: 无法从静态上下文中引用非静态 变量 str
                        maxn=str[i].length();
                             ^
0_0_22132944_21860\Main.java:28: 错误: 无法从静态上下文中引用非静态 变量 str
                String s=str[pos];
                         ^
0_0_22132944_21860\Main.java:32: 错误: 无法从静态上下文中引用非静态 变量 str
                    if(s.contains(str[i])==false)
                                  ^
5 个错误


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