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 } }