java 按概率产生

import java.util.Random;
 
import org.junit.Test;
 
public class Demo1 {
  public void getChance(int percentage){
    Random random = new Random();
    int i = random.nextInt(99);
    if(i>=0&&i<percentage)
      System.out.println("true");
    else
      System.out.println("false");
  }
  @Test
  public void test(){
    for(int i=0;i<100;i++){
      this.getChance(76);  //76%概率
    }
  }