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class TestPubAndPri{
public int publicVar;
private int privateVar;
public int getPrivateVar(){
return this.privateVar;
}
public void setPrivateVar(int i){
this.privateVar = i;
}
}
public class Test{
public static void main(String args[]){
TestPubAndPri t = new TestPubAndPri();
t.publicVar = 10; //不安全
//t.privateVar = 10; 直接赋值会有错误
t.setPrivateVar(20);
System.out.println(t.getPrivateVar());
}
}