Using java to achieve a random sampling of students to answer questions a software that can adjust the list to use when the rolling speed, can save and view history record checks

speech
......\.classpath
......\.project
......\bin
......\...\speech
......\...\......\DialogListener.class
......\...\......\FrameListener.class
......\...\......\SaveAndQuery.class
......\...\......\Speech$Choujiang.class
......\...\......\Speech$StartRun$1.class
......\...\......\Speech$StartRun.class
......\...\......\Speech$SuduListener.class
......\...\......\Speech$ViewHistory.class
......\...\......\Speech.class
......\...\......\Student.class
......\...\......\StudentProduct.class
......\history.dat
......\src
......\...\speech
......\...\......\DialogListener.java
......\...\......\FrameListener.java
......\...\......\SaveAndQuery.java
......\...\......\Speech.java
......\...\......\Student.java
......\...\......\StudentProduct.java
......\student.txt

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